1
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Bera S, Dutta A, Dastidar P. Developing Supramolecular Metallogel Derived from Pd 2L 4 Cage Molecule for Delivering an Anti-Cancer Drug to Melanoma Cell B16-F10. Chem Asian J 2024:e202400419. [PMID: 38872363 DOI: 10.1002/asia.202400419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/10/2024] [Accepted: 06/13/2024] [Indexed: 06/15/2024]
Abstract
Supramolecular gels are an important class of materials that are promising for its wide range of applications including drug delivery. While supramolecular gels are intrinsically porous because of the 3D nano-matrix (gel matrix) that is being formed due to supramolecular self-assembly process involving the gelator molecules during gelation, additional nanopores can be introduced to the overall gel if the gelator molecule itself holds molecular cavity such as metal-organic-cage (MOC) molecules. A MOC having the molecular formula [(Pd2L24).4NO3].3H2O.2DMF.MeOH (Pd-cage) (L2=5-Azido-N,N'-di-pyridin-3-yl-isophthalamide) was successfully synthesized and characterized by FT-IR, 1H NMR, ESI-MS and single crystal X-ray diffraction. Stimuli-reversible supramolecular metallogel PdG could easily be formed from Pd-cage in DMSO/water mixture. The molecular cage of Pd-cage was demonstrated to be available for loading an anti-cancer drug namely doxorubicin (DOX). Subsequently, DOX was also loaded within PdG and delivered to melanoma cell line B16-F10 displaying significant anti-cancer activity as revealed by both MTT and scratch assay. Rheoreversibility of PdG and its ability to load and deliver DOX to cancer cells clearly raised hope for developing this metallogel further as topical anticancer gel.
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Affiliation(s)
- Sourabh Bera
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), Kolkata, 700032, West Bengal, India
| | - Abhishek Dutta
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), Kolkata, 700032, West Bengal, India
| | - Parthasarathi Dastidar
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), Kolkata, 700032, West Bengal, India
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2
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Nagarjuna C, Ramakanth I. Solvent selective gelation of cetyltrimethylammonium bromide: structure, phase evolution and thermal characteristics. ROYAL SOCIETY OPEN SCIENCE 2024; 11:231487. [PMID: 38577219 PMCID: PMC10987984 DOI: 10.1098/rsos.231487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/01/2024] [Accepted: 02/27/2024] [Indexed: 04/06/2024]
Abstract
We report herein the gelation behaviour of cetyltrimethylammonium bromide (CTAB), a cationic surfactant, in a variety of solvent compositions. A turbid gel of CTAB in a binary solvent mixture at a critical composition was observed to be 1 : 3 v/v toluene : water. The molecular structure of the as-formed gel was investigated by X-ray diffraction and microscopic techniques, namely, optical and polarizing microscopy, scanning electron microscopy and small-angle X-ray scattering (SAXS). The phase evolution has been studied using UV-visible transmittance measurements and the thermal characteristics of the gel by differential scanning calorimetry measurements. SAXS studies, in conjunction with molecular modelling, revealed the gel to assemble as lamellae with high interdigitation of bilayer assembly of CTAB molecules with predominant non-covalent interactions, where the gel lamellae were inferred from the interplanar spacings. Rheological studies revealed the viscoelastic nature of the CTAB gels. The ability to form a gel has been evaluated in several polar solvents, such as methanol and chloroform, and non-polar solvents, such as toluene and carbon tetrachloride.
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Affiliation(s)
- Chapireddy Nagarjuna
- Department of Chemistry, School of Advanced Sciences, VIT-AP University, Amaravati, Andhra Pradesh522 241, India
| | - Illa Ramakanth
- Department of Chemistry, School of Advanced Sciences, VIT-AP University, Amaravati, Andhra Pradesh522 241, India
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3
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Ginot L, El Bakkouche A, Giusti F, Dourdain S, Pellet‐Rostaing S. Hydrophobic Porous Liquids with Controlled Cavity Size and Physico-Chemical Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2305906. [PMID: 38036426 PMCID: PMC10811500 DOI: 10.1002/advs.202305906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/17/2023] [Indexed: 12/02/2023]
Abstract
Developing greener hydrometallurgical processes implies offering alternatives to conventional solvents used for liquid-liquid extraction (LLE) of metals. In this context, it is proposed to substitute the organic phase by a hydrophobic silica-based porous liquid (PL). Two different sulfonated hollow silica particles (HSPs) are modified with various polyethoxylated fatty amines (EthAs) forming a canopy that provides both the targeted hydrophobicity and liquefying properties. This study shows that these properties can be tuned by varying the number of ethylene oxide units in the EthA: middle-range molecular weight EthAs allow obtaining a liquid at room temperature, while too short or too long EthA leads to solid particles. Viscosity is also impacted by the density and size of the silica spheres: less viscous PLs are obtained with small low-density spheres, while for larger spheres (c.a. 200 nm) the density has a less significant impact on viscosity. According to this approach, hydrophobic PLs are successfully synthesized. When contacted with an aqueous phase, the most hydrophobic PLs obtained allow a subsequent phase separation. Preliminary extraction tests on three rare earth elements have further shown that functionalization of the PL is necessary to observe metal extraction.
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Affiliation(s)
- Lorianne Ginot
- ICSM, CEA, CNRS, ENSCMUniv MontpellierMarcoule30207France
| | | | - Fabrice Giusti
- ICSM, CEA, CNRS, ENSCMUniv MontpellierMarcoule30207France
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4
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Jiang Y, Ran Z, Wu Y, Zhang M, Ma Y, Zhang D. Reversible fluorescent adhesives based on covalent adaptable networks with dynamic AIE crosslinking: in situ visualization of adhesion capability. Chem Commun (Camb) 2023; 59:12423-12426. [PMID: 37755140 DOI: 10.1039/d3cc03677d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
A new family of reversible fluorescent adhesives based on Diels-Alder covalent adaptable networks with dynamic AIE crosslinks was developed. The accurate intrinsic correlation between the emission behavior, cross-linking state, and adhesion capability can be established, enabling the in situ visualization of adhesion capacity.
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Affiliation(s)
- Yu Jiang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Ziyu Ran
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Yangfei Wu
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Meng Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Ying Ma
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
| | - Daohong Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, Hubei R&D Center of Hyperbranched Polymers Synthesis and Applications, South-Central Minzu University, Wuhan 430074, People's Republic of China.
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5
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Zha J, Huang Q, Liu X, Han X, Guo H. Removal of Calcareous Concretions from Marine Archaeological Ceramics by Means of a Stimuli-Responsive Hydrogel. Polymers (Basel) 2023; 15:2929. [PMID: 37447574 DOI: 10.3390/polym15132929] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/16/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
The presence of calcareous concretions on the surface of marine archaeological ceramics is a frequently observed phenomenon. It is necessary to remove these materials when the deposits obscure the feature of ceramics. Unfortunately, calcareous concretions provide distinctive documentation of the burning history of ceramics. The interaction of acid solution or detachment of the deposit layers in physical ways leads to the loss of archeological information. To prevent the loss of archeological information and to achieve precise and gentle concretion removal, responsive hydrogel cleaning systems have been developed. The hydrogels synthesized are composed of networks of poly(vinyl acetate)/sodium alginate that exhibit desirable water retention properties, are responsive to Ca2+ ions, and do not leave any residues after undergoing cleaning treatment. Four distinct compositions were selected. The study of water retention properties involved quantifying the weight changes. The composition was obtained from Fourier transform infrared spectra. The microstructure was obtained from scanning electron microscopy. The mechanical properties were obtained from rheological measurements. To demonstrate both the efficiency and working mechanism of the selected hydrogels, a representative study of mocked samples is presented first. After selecting the most appropriate hydrogel composite, a cleaning process was implemented on the marine archaeological ceramics. This article demonstrates the advantages of stimuli-responsive hydrogels in controlling the release of acid solution release, thereby surpassing the limitations of traditional cleaning methods.
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Affiliation(s)
- Jianrui Zha
- Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Qijun Huang
- Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Xinyi Liu
- Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiangna Han
- Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Hong Guo
- Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China
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6
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Kaniewska K, Pilecka-Pietrusińska E, Karbarz M. Nanocomposite Organogel for Art Conservation─A Novel Wax Resin Removal System. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24798-24811. [PMID: 37137820 DOI: 10.1021/acsami.3c00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We describe a new, safe, and effective method for removing wax resin adhesive from the canvases of paintings conserved by the once widely used Dutch Method, which involved attaching a new canvas to the back of a painting using an adhesive made of beeswax and natural resin. First, a low-toxicity cleaning mixture for dissolving the adhesive and removing it from the canvases was developed, and then a nanocomposited organogel was obtained. The ability of the organogel to remove the adhesive from canvases was investigated on the lining of the 1878 painting "Battle of Grunwald" by Jan Matejko, with promising results. Additionally, we found that the organogel can be used several times with no visible loss of cleaning ability. Finally, the effectiveness and safety of the method were confirmed on two oil paintings (one from the National Museum in Warsaw): all the wax resin adhesive was removed and the painting regained its original brightness and vivid colors.
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Affiliation(s)
- Klaudia Kaniewska
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, 101 Żwirki i Wigury Av., PL, 02-089 Warsaw, Poland
| | | | - Marcin Karbarz
- Faculty of Chemistry, Biological and Chemical Research Center, University of Warsaw, 101 Żwirki i Wigury Av., PL, 02-089 Warsaw, Poland
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7
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Tripathy D, Gadtya AS, Moharana S. Supramolecular Gel, Its classification, preparation, properties, and applications: A review. POLYM-PLAST TECH MAT 2023. [DOI: 10.1080/25740881.2022.2113892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Debajani Tripathy
- Department of Chemistry, School of Applied Sciences, Centurion University of Technology and Management, Odisha, India
| | - Ankita Subhrasmita Gadtya
- Department of Chemistry, School of Applied Sciences, Centurion University of Technology and Management, Odisha, India
| | - Srikanta Moharana
- Department of Chemistry, School of Applied Sciences, Centurion University of Technology and Management, Odisha, India
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8
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Sun XR, Yang HP, Zhang W, Zhang S, Hu JH, Liu M, Zeng X, Li Q, Redshaw C, Tao Z, Xiao X. Supramolecular Room-Temperature Phosphorescent Hydrogel Based on Hexamethyl Cucurbit[5]uril for Cell Imaging. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4668-4676. [PMID: 36640109 DOI: 10.1021/acsami.2c17891] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The host-guest interaction between hexamethyl cucurbit[5]uril (HmeQ[5]) and 1,4-diaminobenzene (DB) was investigated, and a new low-molecular-weight supramolecular gel was prepared by a simple heating/mixing cooling method. The structure and properties of the supramolecular gel were characterized. Results revealed that DB molecules did not enter the cavity of HmeQ[5] and that hydrogen bonding between the carbonyl group at the HmeQ[5] port and the DB amino groups, together with dipole-dipole interactions and outer wall interactions, were the main driving forces for the formation of the supramolecular gel. The HmeQ[5]/DB gel system exhibits temperature sensitivity. The phosphor 6-bromo-2-naphthol (BrNp) was embedded in the gel to give the gel fluorescent phosphorescence double emission. The double emission ability at room temperature can be attributed to the ordered microstructure of the supramolecular gel, which effectively avoids the nonradiative transition of BrNp. Meanwhile, HmeQ[5]/DB-BrNp has good biocompatibility and low biotoxicity, which is compatible with HeLa cells to achieve cytoplasmic staining of HeLa in the red channel. The supramolecular gels constructed by this supramolecular assembly strategy not only have good temperature sensitivity but also extend the application of Q[n]s in biomedical fields.
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Affiliation(s)
- Xi-Ran Sun
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Hai-Ping Yang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Wei Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Shuai Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Jian-Hang Hu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Ming Liu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Xi Zeng
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Qiu Li
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - Carl Redshaw
- Chemistry, School of Natural Sciences, University of Hull, Hull HU6 7RX, U.K
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
| | - Xin Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Applied Chemistry, Guizhou University, Guiyang 550025, China
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9
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Del Giudice D, Frateloreto F, Sappino C, Di Stefano S. Chemical Tools for the Temporal Control of Water Solution pH and Applications in Dissipative Systems. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Daniele Del Giudice
- University of Rome La Sapienza: Universita degli Studi di Roma La Sapienza Chemistry ITALY
| | - Federico Frateloreto
- University of Rome La Sapienza: Universita degli Studi di Roma La Sapienza Chemistry ITALY
| | - Carla Sappino
- University of Rome La Sapienza: Universita degli Studi di Roma La Sapienza Chemistry ITALY
| | - Stefano Di Stefano
- University of Rome La Sapienza: Universita degli Studi di Roma La Sapienza Chemistry Department Piazzale Aldo Moro 5 00185 Rome ITALY
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10
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Blelloch ND, Yarbrough HJ, Mirica KA. Stimuli-responsive temporary adhesives: enabling debonding on demand through strategic molecular design. Chem Sci 2021; 12:15183-15205. [PMID: 34976340 PMCID: PMC8635214 DOI: 10.1039/d1sc03426j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 10/07/2021] [Indexed: 11/24/2022] Open
Abstract
Stimuli-responsive temporary adhesives constitute a rapidly developing class of materials defined by the modulation of adhesion upon exposure to an external stimulus or stimuli. Engineering these materials to shift between two characteristic properties, strong adhesion and facile debonding, can be achieved through design strategies that target molecular functionalities. This perspective reviews the recent design and development of these materials, with a focus on the different stimuli that may initiate debonding. These stimuli include UV light, thermal energy, chemical triggers, and other potential triggers, such as mechanical force, sublimation, electromagnetism. The conclusion discusses the fundamental value of systematic investigations of the structure-property relationships within these materials and opportunities for unlocking novel functionalities in future versions of adhesives.
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Affiliation(s)
- Nicholas D Blelloch
- Burke Laboratory, Department of Chemistry, Dartmouth College Hanover New Hampshire 03755 USA http://www.miricagroup.com
| | - Hana J Yarbrough
- Burke Laboratory, Department of Chemistry, Dartmouth College Hanover New Hampshire 03755 USA http://www.miricagroup.com
| | - Katherine A Mirica
- Burke Laboratory, Department of Chemistry, Dartmouth College Hanover New Hampshire 03755 USA http://www.miricagroup.com
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11
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Panja SK, Patra S, Bag BG. Self-assembly of the monohydroxy triterpenoid lupeol yielding nano-fibers, sheets and gel: environmental and drug delivery applications. RSC Adv 2021; 11:33500-33510. [PMID: 35497535 PMCID: PMC9042272 DOI: 10.1039/d1ra06137b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/01/2021] [Indexed: 11/21/2022] Open
Abstract
Lupeol is a medicinally important naturally abundant triterpenoid having a 6-6-6-6-5 fused pentacyclic backbone and one polar secondary "-OH" group at the C3 position of the "A" ring. It was extracted from the dried outer bark of Bombax ceiba and its self-assembly properties were investigated in different neat organic as well as aquous-organic binary liquid mixtures. The triterpenoid having only one polar "-OH" group and a rigid lipophilic backbone self-assembled in neat organic non-polar liquids like n-hexane, n-heptane, n-octane and polar liquids like DMSO, DMF, DMSO-H2O, DMF-H2O, and EtOH-H2O yielding supramolecular gels via formation of nano to micrometre long self-assembled fibrillar networks (SAFINs). Morphological investigation of the self-assemblies was carried out by field emission scanning electron microscopy, high resolution transmission electron microscopy, atomic force microscopy, optical microscopy, concentration dependent FTIR and wide angle X-ray diffraction studies. The mechanical properties of the gels were studied by concentration dependent rheological studies in different solvents. The gels were capable of removing toxic micro-pollutants like rhodamine-B and 5,6-carboxyfluorescein as well as the toxic heavy metal Cr(vi) from contaminated water. Moreover release of the chemotherapeutic drug doxorubicin from a drug loaded gel in PBS buffer at pH 7.2 has also been demonstrated by spectrophotometry.
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Affiliation(s)
- Saikat Kumar Panja
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
| | - Soumen Patra
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
| | - Braja Gopal Bag
- Department of Chemistry and Chemical Technology, Vidyasagar University Midnapore 721102 West Bengal India
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12
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Yang Y, Lian X, Yang Z, Zhou Y, Zhang X, Wang Y. Self-Shaping Microemulsion Gels for Cultural Relic Cleaning. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11474-11483. [PMID: 34554765 DOI: 10.1021/acs.langmuir.1c01649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Cleaning is a foundational and essential operation of protection and restoration of cultural relics, which is also the key step of follow-up works. To overcome the problems of uncontrollable diffusion of cleaning solvents and poor coverage of the cleaning solvent carriers on rough surfaces, here, we propose a strategy of using a self-shaping microemulsion gel that is prepared via emulsifying oleophilic solvents into the specific shear-thinning hydrogel structures. The gel can adaptively cover rough surfaces during the cleaning process coupled with avoidance of unnecessary diffusion of the cleaning solvents, and the mechanical reinforcement of in situ polymerized double-network gels enables its easy peeling off from the surfaces without leaving determinable residues. As a representative demonstration, Paraloid B72, a widely used material for the repair and reinforcement of cultural relics, is employed as a model discolored coating, which can be effectively removed from the rough surface of simulated cultural relics after treatment with the resulting gels. Convincingly, the strategy of constructing agarose/polyacrylamide hybrid double-network gels with shear-thinning and self-shaping performances for the cleaning of cultural relics not only improves the convenience and accuracy of operation but also exhibits an efficient cleaning effect, which will greatly expand the application of microemulsion gels in the cleaning of rough surfaces of cultural relics.
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Affiliation(s)
- Yipan Yang
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Xiaodong Lian
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Zhaoxiang Yang
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - You Zhou
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Xiaogang Zhang
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
| | - Yapei Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China
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13
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Makeiff D, Cho J, Godbert N, Smith B, Azyat K, Wagner A, Kulka M, Carlini R. Supramolecular gels from alkylated benzimidazolone derivatives. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Wang S, Yang X, Li Y, Gao B, Jin S, Yu R, Zhang Y, Tang Y. Colloidal magnesium hydroxide Nanoflake: One-Step Surfactant-Assisted preparation and Paper-Based relics protection with Long-Term Anti-Acidification and Flame-Retardancy. J Colloid Interface Sci 2021; 607:992-1004. [PMID: 34571317 DOI: 10.1016/j.jcis.2021.09.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 09/01/2021] [Accepted: 09/07/2021] [Indexed: 01/08/2023]
Abstract
Enhancing the interfacial dispersion and suspension stability is crucial for magnesium hydroxide (Mg(OH)2) nanomaterials in the long-term deacidification of paper-based cultural relics. However, because of the low specific surface area and the poor solvent compatibility of as-prepared large-sized Mg(OH)2, it often tends to agglomerate and settle down during the usage and storage, that is harmful for paper protection due to its unevenly deacidification and nonuniformly distribution on paper cellulose. Herein, we propose a feasible preparation of colloidal Mg(OH)2 ultrathin nanoflakes with high dispersion stability via a simple one-step surfactant-assisted strategy. The surfactant acts as both a structure-direct agent to confine the growth of Mg(OH)2 with rich active sites and a surface modifier to enhance its solvent adaptability and dispersion stability, avoiding the common fussy procedure with additional steric stabilizer. Owing to the evenly interaction with free acid species therein and the uniformly distribution on the paper fiber as alkaline reserve, the as-obtained Mg(OH)2 presents the superior paper protection performance characterized by its safer pH of 7.29 for the original aged paper (pH = 5.03) and the excellent long-term anti-acidification effect with competitive pH of 5.47 after accelerated-aging at 105 °C for 5 months. Furthermore, Mg(OH)2 nanoflakes with surfactant-modified structure also endue them as an improved flame retardant for multifunctional paper protection. The protection with Mg(OH)2 has little effect on the paper surface properties and cellulose crystallinity, in line with the principle of least intervention. This work will put forward a feasible way toward colloidal Mg(OH)2 nanoflakes with excellent paper protection performance, shedding light on the development of emerging protection materials for paper-based cultural relics.
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Affiliation(s)
- Sinong Wang
- Institute for Preservation of Chinese Ancient Books, Fudan University Library, Fudan University, Shanghai 200433, PR China.
| | - Xue Yang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, PR China
| | - Yihan Li
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, PR China
| | - Boxu Gao
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, PR China
| | - Shanshan Jin
- Institute for Preservation of Chinese Ancient Books, Fudan University Library, Fudan University, Shanghai 200433, PR China
| | - Rong Yu
- Chinese Rare Books Department, Fudan University Library, Fudan University, Shanghai 200433, PR China
| | - Yahong Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, PR China
| | - Yi Tang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, PR China.
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15
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Ghorai S, Bag BG. Garland, Flower, and Petals via a Hierarchical Self-Assembly of Ursane-Type Triterpenoid Uvaol. ACS OMEGA 2021; 6:20560-20568. [PMID: 34396001 PMCID: PMC8359174 DOI: 10.1021/acsomega.1c02630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 07/13/2021] [Indexed: 05/04/2023]
Abstract
Uvaol, a 6-6-6-6-6 pentacyclic dihydroxy ursane-type triterpenoid, is isolable from different parts of plants Plumeria rubra, Olea europaea, Nerium oleander, Lavandula pedunculta, and Malus domestica. It is also obtained by a one-step reduction of naturally occurring triterpenoid ursolic acid. Herein, we report the first self-assembly properties of uvaol in different neat organic liquids and aqueous organic binary liquid mixtures. Spontaneous self-assembly of uvaol in different neat liquids and binary liquid mixtures yielded garland, flower, and petal-like porous superstructures of nano- to micrometer dimensions. Utilization of self-assemblies has been demonstrated in generation of anticancer drug conjugates and the removal of carcinogenic and toxic chemicals.
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Affiliation(s)
- Subrata Ghorai
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Braja Gopal Bag
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
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16
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Ghorai S, Bag BG. First Vesicular Self‐assembly of a Trihydroxy‐Diterpenoid Andrographolide in Aqueous Medium: Entrapment and Release of Fluorophore and Anti‐Cancer Drug Doxorubicin. ChemistrySelect 2020. [DOI: 10.1002/slct.202003248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Subrata Ghorai
- Department of Chemistry and Chemical Technology Vidyasagar University Midnapore 721102 West Bengal India
| | - Braja Gopal Bag
- Department of Chemistry and Chemical Technology Vidyasagar University Midnapore 721102 West Bengal India
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17
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Panja S, Bag BG. Flower- and Grass-like Self-Assemblies of an Oleanane-Type Triterpenoid Erythrodiol: Application in the Removal of Toxic Dye from Water. ACS OMEGA 2020; 5:30488-30494. [PMID: 33283097 PMCID: PMC7711690 DOI: 10.1021/acsomega.0c04291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/28/2020] [Indexed: 05/10/2023]
Abstract
Erythrodiol (3β-olean-12-ene-3, 28-diol) (C30H50O2) 1 is a nanosized oleanane-type fused 6-6-6-6-6 pentacyclic triterpeneoid extractable from the dried leaves of olive (Olea europia). One step reduction of oleanolic acid extracted from Lantana camara also yields the same compound. The triterpenoid has one secondary -OH group attached at C3 of the "A" ring and one primary -OH group at C28 present at the junction of the "D" and "E" rings. Here, we report the spontaneous self-assembly of erythrodiol in different neat organic liquids and aqueous-organic liquid mixtures. The nanosized dihydroxy triterpenoid having an oleanane-type lipophilic rigid skeleton self-assembled in liquids, yielding nanosized fibrils, microsized flowers, and grass-like architectures via formation of densely assembled fibrils and petals or 2D sheets. The microstructures of the self-assemblies have been characterized by different techniques like optical microscopy, electron microscopy, atomic force microscopy, FTIR, and wide angle X-ray diffraction studies. The porous self-assemblies having a large surface area obtained from 1 were capable of adsorbing toxic fluorophores like rhodamine-B, rhodamine-6G, methylene blue, and crystal violet (CV). Moreover, removal of the aforementioned toxic pigments has also been demonstrated from their aqueous solutions by using UV-visible spectrophotometry and epifluorescence microscopy.
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Affiliation(s)
- Saikat
Kumar Panja
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore, West Bengal 721102, India
| | - Braja Gopal Bag
- Department of Chemistry and
Chemical Technology, Vidyasagar University, Midnapore, West Bengal 721102, India
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18
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Castel A, Gutfreund P, Cabane B, Rharbi Y. Stability of Fluid Ultrathin Polymer Films in Contact with Solvent-Loaded Gels for Cultural Heritage. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12607-12619. [PMID: 33044083 DOI: 10.1021/acs.langmuir.0c02162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The removal of ultrathin amorphous polymer films in contact with an aqueous gelled solution containing small amounts of good solvent is addressed by means of specular and off-specular neutron reflectometry. The distribution of heavy water and benzyl alcohol is revealed inside Laropal A81, often employed as a protective varnish layer for Culture Heritage in the restoration of easel paintings. The swelling kinetics, interface roughness, and film morphologies were recorded as a function of temperature and increasing benzyl alcohol concentration in the dispersion of Pemulen TR-2, a hydrophobically modified acrylic acid copolymer. The addition of small amounts of good solvent results in the appearance of water-filled cavities inside the varnish, which grow with time. It is shown that while increasing the solvent concentration greatly enhances the hole growth kinetics, an increase in temperature above the glass transition temperature does not have such a big effect on the kinetics.
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Affiliation(s)
- Amélie Castel
- Large Scale Structures Group, Institut Laue-Langevin, Grenoble 38000, France
- Laboratoire de Rhéologie et Procédés, Grenoble 38000, France
| | - Philipp Gutfreund
- Large Scale Structures Group, Institut Laue-Langevin, Grenoble 38000, France
| | | | - Yahya Rharbi
- Laboratoire de Rhéologie et Procédés, Grenoble 38000, France
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19
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Jia Y, Sciutto G, Mazzeo R, Samorì C, Focarete ML, Prati S, Gualandi C. Organogel Coupled with Microstructured Electrospun Polymeric Nonwovens for the Effective Cleaning of Sensitive Surfaces. ACS APPLIED MATERIALS & INTERFACES 2020; 12:39620-39629. [PMID: 32820898 PMCID: PMC8009474 DOI: 10.1021/acsami.0c09543] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/07/2020] [Indexed: 05/21/2023]
Abstract
Hydrogels and organogels are widely used as cleaning materials, especially when a controlled solvent release is necessary to prevent substrate damage. This situation is often encountered in the personal care and electronic components fields and represents a challenge in restoration, where the removal of a thin layer of aged varnish from a painting may compromise the integrity of the painting itself. There is an urgent need for new and effective cleaning materials capable of controlling and limiting the use of solvents, achieving at the same time high cleaning efficacy. In this paper, new sandwich-like composites that fully address these requirements are developed by using an organogel (poly(3-hydroxybutyrate) + γ-valerolactone) in the core and two external layers of electrospun nonwovens made of continuous submicrometric fibers produced by electrospinning (either poly(vinyl alcohol) or polyamide 6,6). The new composite materials exhibit an extremely efficient cleaning action that results in the complete elimination of the varnish layer with a minimal amount of solvent adsorbed by the painting layer after the treatment. This demonstrates that the combined materials exert a superficial action that is of utmost importance to safeguard the painting. Moreover, we found that the electrospun nonwoven layers act as mechanically reinforcement components, greatly improving the bending resistance of organogels and their handling. The characterization of these innovative cleaning materials allowed us to propose a mechanism to explain their action: electrospun fibers play the leading role by slowing down the diffusion of the solvent and by conferring to the entire composite a microstructured rough superficial morphology, enabling to achieve outstanding cleaning performance.
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Affiliation(s)
- Yiming Jia
- Department
of Chemistry “G. Ciamician”, Microchemistry and Microscopy
Art Diagnostic Laboratory (M2ADL), University
of Bologna, Via Guaccimanni 42, 48121 Ravenna, Italy
- Chongqing
Cultural Heritage Research Institute, 400013 Chongqing, China
| | - Giorgia Sciutto
- Department
of Chemistry “G. Ciamician”, Microchemistry and Microscopy
Art Diagnostic Laboratory (M2ADL), University
of Bologna, Via Guaccimanni 42, 48121 Ravenna, Italy
| | - Rocco Mazzeo
- Department
of Chemistry “G. Ciamician”, Microchemistry and Microscopy
Art Diagnostic Laboratory (M2ADL), University
of Bologna, Via Guaccimanni 42, 48121 Ravenna, Italy
| | - Chiara Samorì
- Department
of Chemistry “G. Ciamician”, University of Bologna, Via Sant’Alberto 163, 48123 Ravenna, Italy
| | - Maria Letizia Focarete
- Department
of Chemistry “Giacomo Ciamician” and INSTM UdR of Bologna, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Health
Sciences & Technologies (HST) CIRI, University of Bologna, Via Tolara di Sopra 41/E, 40064 Ozzano Emilia Bologna, Italy
| | - Silvia Prati
- Department
of Chemistry “G. Ciamician”, Microchemistry and Microscopy
Art Diagnostic Laboratory (M2ADL), University
of Bologna, Via Guaccimanni 42, 48121 Ravenna, Italy
| | - Chiara Gualandi
- Department
of Chemistry “Giacomo Ciamician” and INSTM UdR of Bologna, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Interdepartmental
Center for Industrial Research on Advanced Applications in Mechanical
Engineering and Materials Technology, CIRI-MAM, University of Bologna, Viale Risorgimento, 2, 40136 Bologna, Italy
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20
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Di Napoli B, Franco S, Severini L, Tumiati M, Buratti E, Titubante M, Nigro V, Gnan N, Micheli L, Ruzicka B, Mazzuca C, Angelini R, Missori M, Zaccarelli E. Gellan Gum Microgels as Effective Agents for a Rapid Cleaning of Paper. ACS APPLIED POLYMER MATERIALS 2020; 2:2791-2801. [PMID: 32685926 PMCID: PMC7359273 DOI: 10.1021/acsapm.0c00342] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 05/27/2020] [Indexed: 05/21/2023]
Abstract
Microgel particles have emerged in the past few years as a favorite model system for fundamental science and for innovative applications ranging from the industrial to biomedical fields. Despite their potentialities, no works so far have focused on the application of microgels for cultural heritage preservation. Here we show their first use for this purpose, focusing on wet paper cleaning. Exploiting their retentive properties, microgels are able to clean paper, ensuring more controlled water release from the gel matrix, in analogy to their macroscopic counterpart, i.e., hydrogels. However, differently from these, the reduced size of microgels makes them suitable to efficiently penetrate in the porous structure of the paper and to easily adapt to the irregular surfaces of the artifacts. To test their cleaning abilities, we prepare microgels made of Gellan gum, a natural and widespread material already used as a hydrogel for paper cleaning, and apply them to modern and ancient paper samples. Combining several diagnostic methods, we show that microgels performances in the removal of cellulose degradation byproducts for ancient samples are superior to commonly employed hydrogels and water bath treatments. This is due to the composition and morphology of ancient paper, which facilitates microgels penetration. For modern paper cleaning, performances are at least comparable to the other methods. In all cases, the application of microgels takes place on a time scale of a few minutes, opening the way for widespread use as a rapid and efficient cleaning protocol.
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Affiliation(s)
- Benedetta Di Napoli
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Silvia Franco
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Leonardo Severini
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Manuel Tumiati
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Elena Buratti
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Mattia Titubante
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Valentina Nigro
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
- ENEA
C.R. Frascati, FSN-TECFIS-MNF
Photonics Micro and Nanostructures Laboratory, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - Nicoletta Gnan
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Laura Micheli
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Barbara Ruzicka
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Claudia Mazzuca
- Department
of Chemical Sciences and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica I, 00133 Rome, Italy
| | - Roberta Angelini
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Mauro Missori
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
| | - Emanuela Zaccarelli
- Institute
for Complex Systems, National Research Council (CNR-ISC) and Department
of Physics, Sapienza University of Rome, Piazzale A. Moro 2, 00185 Rome, Italy
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21
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Zhang Q, Mugele F, Lugt PM, van den Ende D. Characterizing the fluid-matrix affinity in an organogel from the growth dynamics of oil stains on blotting paper. SOFT MATTER 2020; 16:4200-4209. [PMID: 32292958 DOI: 10.1039/c9sm01965k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Grease, as used for lubrication of rolling bearings, is a two-phase organogel that slowly releases oil from its gelator matrix. Because the rate of release determines the operation time of the bearing, we study this release process by measuring the amount of extracted oil as a function of time, while we use absorbing paper to speed up the process. The oil concentration in the resulting stain is determined by measuring the attenuation of light transmitted through the paper, using a modified Lambert-Beer law. For grease, the timescale for paper imbibition is typically 2 orders of magnitude larger than for a bare drop of the same base oil. This difference results from the high affinity, i.e. wetting energy per unit volume, of the oil for the grease matrix. To quantify this affinity, we developed a Washburn-like model describing the oil flow from the porous grease into the paper pores. The stain radius versus time curves for greases at various levels of oil content collapse onto a single master curve, which allows us to extract a characteristic spreading time and the corresponding oil-matrix affinity. Lowering the oil content results in a small increase of the oil-matrix affinity yet also in a significant change in the spreading timescale. Even an affinity increase of a few per mill doubles the timescale.
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Affiliation(s)
- Qierui Zhang
- Physics of Complex Fluids, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P. O. Box 217, 7500AE, Enschede, The Netherlands.
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22
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Bag BG, Barai AC, Hasan SN, Panja SK, Ghorai S, Patra S. Terpenoids, nano-entities and molecular self-assembly. PURE APPL CHEM 2020. [DOI: 10.1515/pac-2019-0812] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPlant metabolites being renewable in nature have tremendous significance for the development of a sustainable society. In this manuscript we show that, terpenoids having nanometric lengths, commonly having several functional groups and several centers of chirality, can be utilized as renewable Molecular Functional Nanos (MFNs). The terpenoids spontaneously self-assembled in liquids yielding different morphologies such as vesicles, tubes, flowers, petals and fibers of nano- to micro-meter dimensions and supramolecular gels. The self-assemblies were utilized for the entrapment and release of fluorophores including anticancer drug, pollutant capture, generation of hybrid materials and catalysis.
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Affiliation(s)
- Braja Gopal Bag
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Abir Chandan Barai
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Sk Nurul Hasan
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Saikat Kumar Panja
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Subrata Ghorai
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
| | - Soumen Patra
- Department of Chemistry and Chemical Technology, Vidyasagar University, Midnapore 721102, West Bengal, India
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23
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Dual physically and chemically crosslinked regenerated cellulose – Gelatin composite hydrogels towards art restoration. Carbohydr Polym 2020; 234:115885. [DOI: 10.1016/j.carbpol.2020.115885] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/14/2020] [Accepted: 01/15/2020] [Indexed: 11/23/2022]
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24
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Castel A, Gutfreund P, Cabane B, Rharbi Y. Swelling, dewetting and breakup in thin polymer films for cultural heritage. SOFT MATTER 2020; 16:1485-1497. [PMID: 31930258 DOI: 10.1039/c9sm01976f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The removal of ultrathin amorphous polymer films in contact with nonsolvent/solvent binary mixtures is addressed by means of neutron reflectometry and atomic force microscopy. The high resolution of neutron scattering makes it possible to resolve the distribution profiles of heavy water and benzyl alcohol inside Laropal®A81, often employed as a protective varnish layer for Culture Heritage in restoration of easel paintings. The swelling kinetics and distribution profiles were recorded as a function of time and increasing benzyl alcohol concentration in water. The varnish film swells by penetration of the good solvent. At higher concentrations water-filled cavities appear inside the varnish and grow with time. Contrary to homogeneous dissolution dewetting is observed at late stages of exposure to the liquid which leads to the Breakup of the film. The high resolution measurements are compared to bulk behaviour characterized by the ternary phase diagram and the Flory-Huggins interaction parameters are calculated and used to predict the swelling and solvent partition in the films. Distinct differences of the thin film to bulk behaviour are found. The expectations made previously for the behaviour of solvent/non-solvent mixtures on the removal of thin layers in the restoration of easel paintings should be revised in view of surface interactions.
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25
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Chelazzi D, Bordes R, Giorgi R, Holmberg K, Baglioni P. The use of surfactants in the cleaning of works of art. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2019.12.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Choudhury P, Dinda S, Kumar Das P. Fabrication of soft-nanocomposites from functional molecules with diversified applications. SOFT MATTER 2020; 16:27-53. [PMID: 31693041 DOI: 10.1039/c9sm01304k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
With the increasing demand for new soft materials having excellent physical and biological characteristics and functionality, the design of hybrid materials offers a simple, yet versatile platform for the development of materials with specific and tunable properties. By definition a "soft-nanocomposite" is the combination of supramolecular self-assemblies with nanomaterials of different origins (inorganic/metallic nanoparticles and carbonaceous allotropes like carbon nanotubes and graphene) through covalent/non-covalent interactions. Dynamic supramolecular self-assemblies can serve as excellent hosts for the incorporation of these dimensionally different nanomaterials. Nanomaterials within the matrix of supramolecular self-assemblies can give rise to new characteristics due to the synergistic contribution of both materials. Although the very initial work intended to use molecular gels as media for the preparation and stabilization of nanoparticles, recent reports have suggested that amalgamation of different supramolecular self-assemblies with nanoparticles is advantageous for both constituents. These newly developed soft-nanocomposites have interesting properties including electrical conductivity, viscoelasticity, thermal robustness, magnetic, phase-selective, redox and near-infrared radiation sensitive properties and so on. This review will focus on some of the most recent advancements in the development of novel soft-nanocomposites. In particular, we intend to correlate various design strategies for synthesis as well as composite preparation from functional molecules with interesting applications in the area of supercapacitors, nanoelectronics, photovoltaic devices, chemical and biosensors, biomedicine and so on. We expect that this article will be a general and conceptual demonstration of various approaches to develop different soft-nanocomposites and will highlight their applications across disciplines.
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Affiliation(s)
- Pritam Choudhury
- School of Biological Sciences, Indian Association for the Cultivation of Science Jadavpur, Kolkata-700 032, India.
| | - Soumik Dinda
- School of Biological Sciences, Indian Association for the Cultivation of Science Jadavpur, Kolkata-700 032, India.
| | - Prasanta Kumar Das
- School of Biological Sciences, Indian Association for the Cultivation of Science Jadavpur, Kolkata-700 032, India.
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27
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Bertasa M, Dodero A, Alloisio M, Vicini S, Riedo C, Sansonetti A, Scalarone D, Castellano M. Agar gel strength: A correlation study between chemical composition and rheological properties. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109442] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Bag BG, Barai AC. Self-assembly of naturally occurring stigmasterol in liquids yielding a fibrillar network and gel. RSC Adv 2020; 10:4755-4762. [PMID: 35495245 PMCID: PMC9049162 DOI: 10.1039/c9ra10376g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/21/2020] [Indexed: 01/07/2023] Open
Abstract
Stigmasterol extracted from the leaves of Roscoea purpurea spontaneously self-assembled in liquids yielding a fibrillar network and gel.
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Affiliation(s)
- Braja Gopal Bag
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- India
| | - Abir Chandan Barai
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- India
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29
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Freese S, Diraoui S, Mateescu A, Frank P, Theodorakopoulos C, Jonas U. Polyolefin-Supported Hydrogels for Selective Cleaning Treatments of Paintings. Gels 2019; 6:E1. [PMID: 31861489 PMCID: PMC7151125 DOI: 10.3390/gels6010001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 01/15/2023] Open
Abstract
Surface decontamination is of general concern in many technical fields including optics, electronics, medical environments, as well as art conservation. In this respect, we developed thin copolymer networks covalently bonded to flexible polyethylene (PE) sheets for hydrogel-based cleaning of varnished paintings. The syntheses of acrylates and methacrylates of the surfactants Triton X-100, Brij 35, and Ecosurf EH-3 or EH-9 and their incorporation into copolymers with acrylamide (PAM) and N-(4-benzoylphenyl)acrylamide are reported. Photocrosslinked polymer networks were prepared from these copolymers on corona-treated PE sheets, which can be swollen with aqueous solution to form hydrogel layers. The cleaning efficacy of these PE-PAM hydrogel systems, when swollen with appropriate cleaning solutions, was evaluated on painting surfaces in dependence of the PAM copolymer composition and degree of crosslinking. Specifically, soil and varnish removal and varnish surface solubilization were assessed on mock-ups as well as on paintings, indicating that even surfactant-free cleaning solutions were effective.
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Affiliation(s)
- Silvia Freese
- Department Chemistry - Biology, University of Siegen, Adolf-Reichwein-Strasse 2, D-57076 Siegen, Germany; (S.F.); (S.D.); (P.F.)
| | - Samar Diraoui
- Department Chemistry - Biology, University of Siegen, Adolf-Reichwein-Strasse 2, D-57076 Siegen, Germany; (S.F.); (S.D.); (P.F.)
| | - Anca Mateescu
- Continental Automotive Romania, Research and Development, Display Technology Department, Strada Siemens 1, 300704 Timisoara, Romania;
| | - Petra Frank
- Department Chemistry - Biology, University of Siegen, Adolf-Reichwein-Strasse 2, D-57076 Siegen, Germany; (S.F.); (S.D.); (P.F.)
| | - Charis Theodorakopoulos
- Department of Arts, Science in Conservation of Fine Art, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
| | - Ulrich Jonas
- Department Chemistry - Biology, University of Siegen, Adolf-Reichwein-Strasse 2, D-57076 Siegen, Germany; (S.F.); (S.D.); (P.F.)
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30
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Duncan TT, Chan EP, Beers KL. Maximizing Contact of Supersoft Bottlebrush Networks with Rough Surfaces To Promote Particulate Removal. ACS APPLIED MATERIALS & INTERFACES 2019; 11:45310-45318. [PMID: 31714735 PMCID: PMC11005111 DOI: 10.1021/acsami.9b17602] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Efficient removal of particulates from a rough surface with a soft material through a "press and peel" method (i.e., an adhesion and release approach) depends on good conformal contact at the interface; a material should be sufficiently soft to maximize contact with a particle while also conforming to rough surface features to clean the entire substrate surface. Here, we investigate the use of bottlebrush networks-extremely soft elastomers composed of macromolecules with polymeric side chains-as materials for cleaning model substrates of varying roughness. Formed through free-radical polymerization of mono- and dimethacrylate functionalized polysiloxanes, these solvent-free supersoft elastomers exhibit moduli comparable to those of solvated gels, allowing for a lower moduli regime of elastomers to be used in contact experiments than previously possible. By varying the macromonomer to cross-linker ratio, we study the effect of modulus on conformal contact and cleaning for materials that are as soft as gels while minimizing/negating physical and/or chemical concerns that using a traditional material may involve (e.g., changes in component concentrations, solvent evaporation, and syneresis). We study cleaning efficacy by quantifying the conformal contact between soft materials and rough substrates via a contact adhesion-based measurement. These results give insight into the correlation between shear modulus and conformal contact with surfaces of varying feature height. Not only does a decrease in shear modulus leads to improved conformal contact with rough surfaces, but also it facilitates adhesion to particulates situated on the rough surface, thus aiding removal. We highlight this property control with a case study illustrating the removal of an artificial soil mixture from a rough, acrylic surface via peeling rather than rubbing, which can cause damage to delicate surfaces.
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Affiliation(s)
- Teresa T. Duncan
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Edwin P. Chan
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Kathryn L. Beers
- Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
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Parveen R, Jayamma B, Dastidar P. Supramolecular Gels Derived from Simple Organic Salts of Flufenamic Acid: Design, Synthesis, Structures, and Plausible Biomedical Application. ACS Biomater Sci Eng 2019; 5:2180-2189. [PMID: 33405770 DOI: 10.1021/acsbiomaterials.9b00153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Following supramolecular synthon rationale in the context of crystal engineering, a nonsteroidal-anti-inflammatory-drug (NSAID), namely flufenamic acid (FA) and its β-alanine monopeptide derivative (FM), were converted to a series of primary ammonium monocarboxylate (PAM) salts. Majority of the PAM salts (∼90%) showed gelation with various solvents including water and methyl salicylate (important solvents in topical gel formulation). Structure-property correlation studies based on single-crystal X-ray diffraction (SXRD) and powder X-ray diffraction (PXRD) data provided intriguing insights into the structure of the gel network. Furthermore, one of the gelator salts (S7) displayed anticancer activity on a highly aggressive human breast cancer cell line (MDA-MB-231) ,as revealed by MTT, PEG2, and cell migration assays.
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Affiliation(s)
- Rumana Parveen
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032,West Bengal, India
| | - Bandi Jayamma
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032,West Bengal, India
| | - Parthasarathi Dastidar
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata 700032,West Bengal, India
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32
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Guan XW, Lin Q, Zhang YM, Wei TB, Wang J, Fan YQ, Yao H. Pillar[5]arene-based spongy supramolecular polymer gel and its properties in multi-responsiveness, dye sorption, ultrasensitive detection and separation of Fe 3. SOFT MATTER 2019; 15:3241-3247. [PMID: 30916674 DOI: 10.1039/c8sm02482k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein, a novel way to design and construct multi-functional spongy supramolecular polymer gels through an easy to make tripodal guest (TA) and a naphthalimide functionalized-pillar[5]arene host (AP5) has been developed. According to this approach, a novel pillar[5]arene-based supramolecular polymer gel (SHG) was constructed via multi-non-covalent interactions such as host-guest inclusion, C-Hπ, ππ and hydrogen bonds and so on. Interestingly, the SHG exhibits a spongy structure and strong aggregation induced emission (AIE). Furthermore, the SHG also exhibited multi-responsiveness toward outer stimuli such as heating-cooling, pH, competitive agents and mechanical. More importantly, the SHG xerogel shows separation properties for Fe3+, methyl orange, methylene blue and sudan I dyes. The separation rates of SHG xerogel for Fe3+ ions and organic dyes can reach up to 99.8%. Simultaneously, the SHG could ultrasensitively detect Fe3+ (LOD is 0.9 nM). In addition, a thin film based on SHG was also prepared, which was confirmed to be a convenient test kit for detecting Fe3+.
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Affiliation(s)
- Xiao-Wen Guan
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.
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33
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Bag BG, Garai C, Ghorai S. Vesicular self-assembly of a natural ursane-type dihydroxy-triterpenoid corosolic acid. RSC Adv 2019; 9:15190-15195. [PMID: 35514858 PMCID: PMC9064250 DOI: 10.1039/c9ra02801c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 05/07/2019] [Indexed: 02/06/2023] Open
Abstract
Corosolic acid, a natural ursane-type 6-6-6-6-6 pentacyclic dihydroxy triterpenic acid, is a well known antidiabetic compound extractable from leaves of Psidium guajava. In this manuscript we have reported the self-assembly properties of corosolic acid in different liquids. The compound undergoes self-assembly to give vesicular morphology in different aqueous organic liquids. Supramolecular gels were also obtained in some aqueous binary liquids such as ethanol–water and dimethyl formamide–water. The morphology of the self-assemblies of corosolic acid were characterized by using different microscopic techniques like optical microscopy, field emission scanning electron microscopy, transmission electron microscopy, atomic force microscopy as well as XRD and FTIR studies. We also demonstrated the application of vesicular self-assemblies for the entrapment and release of fluorophores including an anticancer drug. Corosolic acid, a natural ursane-type 6-6-6-6-6 pentacyclic dihydroxy triterpenic acid, self-assembled in binary liquid mixtures yielding vesicles.![]()
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Affiliation(s)
- Braja G. Bag
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Chhabi Garai
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Subrata Ghorai
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
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34
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Girginova PI, Galacho C, Veiga R, Santos Silva A, Candeias A. Inorganic Nanomaterials for Restoration of Cultural Heritage: Synthesis Approaches towards Nanoconsolidants for Stone and Wall Paintings. CHEMSUSCHEM 2018; 11:4168-4182. [PMID: 30346657 DOI: 10.1002/cssc.201801982] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/17/2018] [Indexed: 06/08/2023]
Abstract
The synthesis of inorganic nanostructured materials for the consolidation of stone and wall paintings is reviewed. To begin, a description of the methods most commonly used to prepare nanoconsolidants is provided, particularly in the frame of colloid chemistry. Some concepts of the carbonation mechanism as well as the transport properties of some of these materials are addressed. An overview of the synthesis methods together with some of the application particularities of the distinct consolidants are presented thereafter. Furthermore, the requisites for efficient consolidants and some drawbacks of the nanoconsolidants are discussed.
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Affiliation(s)
- Penka I Girginova
- HERCULES Laboratory, University of Évora, Palácio do Vimioso, Largo Marquês de Marialva, 8, 7000-809, Évora, Portugal
- National Laboratory for Civil Engineering-LNEC, Av. do Brasil 101, 1700-066, Lisbon, Portugal
| | - Cristina Galacho
- HERCULES Laboratory, University of Évora, Palácio do Vimioso, Largo Marquês de Marialva, 8, 7000-809, Évora, Portugal
- School of Sciences and Technology-Chemistry Department, University of Évora, Rua Romão Ramalho 59, 7000-671, Évora, Portugal
| | - Rosário Veiga
- National Laboratory for Civil Engineering-LNEC, Av. do Brasil 101, 1700-066, Lisbon, Portugal
| | - António Santos Silva
- National Laboratory for Civil Engineering-LNEC, Av. do Brasil 101, 1700-066, Lisbon, Portugal
| | - António Candeias
- HERCULES Laboratory, University of Évora, Palácio do Vimioso, Largo Marquês de Marialva, 8, 7000-809, Évora, Portugal
- School of Sciences and Technology-Chemistry Department, University of Évora, Rua Romão Ramalho 59, 7000-671, Évora, Portugal
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Sarkar K, Dastidar P. Rational Approach Towards Designing Metallogels From a Urea-Functionalized Pyridyl Dicarboxylate: Anti-inflammatory, Anticancer, and Drug Delivery. Chem Asian J 2018; 14:194-204. [PMID: 30358173 DOI: 10.1002/asia.201801462] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 10/25/2018] [Indexed: 12/25/2022]
Abstract
A structural rationale was adopted to design a series of metallogels from a newly synthesized urea-functionalized dicarboxylate ligand, namely, 5-[3-(pyridin-3-yl)ureido]isophthalic acid (PUIA), that produces metallogels upon reaction with various metal salts (CuII , ZnII , CoII , CdII , and NiII salts) at room temperature. The gels were characterized by dynamic rheology and transmission electron microscopy (TEM). The existence of a coordination bond in the gel state was probed by FTIR and 1 H NMR spectroscopy in a ZnII metallogel (i.e., MG2). Single crystals isolated from the reaction mixture of PUIA and CoII or CdII salts characterized by X-ray diffraction revealed lattice inclusion of solvent molecules, which was in agreement with the hypothesis based on which the metallogels were designed. MG2 displayed anti-inflammatory response (prostaglandin E2 assay) in the macrophage cell line (RAW 264.7) and anticancer properties (cell migration assay) on a highly aggressive human breast cancer cell line (MDA-MB-231). The MG2 metallogel matrix could also be used to load and release (pH responsive) the anticancer drug doxorubicin. Fluorescence imaging of MDA-MB-231 cells treated with MG2 revealed that it was successfully internalized.
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Affiliation(s)
- Koushik Sarkar
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India
| | - Parthasarathi Dastidar
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India
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36
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Application of polymer coatings and nanoparticles in consolidation and hydrophobic treatment of stone monuments. IRANIAN POLYMER JOURNAL 2018. [DOI: 10.1007/s13726-018-0673-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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37
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Meyer AR, Bender CR, Dos Santos DM, Ziembowicz FI, Frizzo CP, Villetti MA, Reichert JM, Zanatta N, Bonacorso HG, Martins MAP. Effect of slight structural changes on the gelation properties of N-phenylstearamide supramolecular gels. SOFT MATTER 2018; 14:6716-6727. [PMID: 30062361 DOI: 10.1039/c8sm00961a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular gels present several applications in which the gelator properties are closely dependent on their structure and solvent. Despite this, there are few studies on the effect of the gelation ability of gelators with slight molecular changes. Therefore, N-arylestearamides (in which aryl = phenyl (1), 4-tolyl (2) and 4-acetylphenyl (3)) were evaluated in different solvents. The critical gelefication concentration (CGC) values indicated that the substituents can significantly affect the concentration at which the supramolecular gels are formed, mainly in non-aromatic solvents (e.g. cyclohexane, acetonitrile and DMSO). From UV-Vis and DSC data, we verified that the gel-sol and sol-gel transitions (Tgel-sol and Tsol-gel) increase in the order of 1 < 2 < 3. Organogel strength was evaluated for 1-3 as a function of concentration and solvent type using rheology data. Gel strength is concentration-dependent and a strength order was found in acetonitrile, cyclohexane and DMSO, in which: 1 ∼ 2 > 3. Dynamic viscoelastic measurements as a function of temperature sweeps indicate a predominantly enthalpic contribution to the elasticity of the organogels formed from 1-3. Temperature-dependent 1H NMR indicates that NHO interactions may be responsible for the molecular association of molecules into 1D fibers, while 3D fibers were formed from van der Waals interactions.
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Affiliation(s)
- Alexandre R Meyer
- Núcleo de Química de Heterociclos (NUQUIMHE), Department of Chemistry, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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38
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Maity A, Dey A, Si MK, Ganguly B, Das A. Impact of "half-crown/two carbonyl"-Ca 2+ metal ion interactions of a low molecular weight gelator (LMWG) on its fiber to nanosphere morphology transformation with a gel-to-sol phase transition. SOFT MATTER 2018; 14:5821-5831. [PMID: 29972192 DOI: 10.1039/c8sm01071d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report here a smart functional low molecular weight gelator (LMWG) L, containing an unusual metal ion coordination site, i.e. "half-crown/two carbonyl". The gelator L shows excellent gelation behavior with typical fibrillar morphology in acetonitrile, methanol and ethanol media. Upon Ca2+ ion binding with its "half-crown/two carbonyl" coordination site, the acetonitrile gel of L exhibits a fiber to nanosphere morphology transformation along with a gel-to-sol phase transition as confirmed by microscopic investigation and by direct naked eye visualization, respectively. The mechanism involved in this morphology transformation and gel-to-sol phase transition process was studied thoroughly with the help of computational calculations and various spectroscopic experiments and discussed.
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Affiliation(s)
- Arunava Maity
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, Maharashtra, India.
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39
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Biswas P, Ganguly S, Dastidar P. Stimuli-Responsive Metallogels for Synthesizing Ag Nanoparticles and Sensing Hazardous Gases. Chem Asian J 2018; 13:1941-1949. [PMID: 29863308 DOI: 10.1002/asia.201800743] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 05/31/2018] [Indexed: 02/28/2024]
Abstract
A newly synthesized bis-pyridyl ligand having a diphenyl ether backbone (LP6) displayed the ability to form crystalline coordination polymers (CP1-CP6) which were fully characterized by single crystal X-ray diffraction. Most of the resulting polymers were lattice-occluded crystalline solids-a structural characteristic reminiscent to gels. The reactants of the coordination polymers produced metallogels in DMSO/water confirming the validity of the design principles with which the coordination polymers were synthesized. Some of the metallogels displayed material properties like in situ synthesis of Ag nanoparticles and stimuli-responsive gel-sol transition including sensing hazardous gases like ammonia and hydrogen sulfide.
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Affiliation(s)
- Protap Biswas
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road Jadavpur, Kolkata, 700032, West Bengal, India
| | - Sumi Ganguly
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road Jadavpur, Kolkata, 700032, West Bengal, India
| | - Parthasarathi Dastidar
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road Jadavpur, Kolkata, 700032, West Bengal, India
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40
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Chakraborty P, Dastidar P. Exploring Orthogonal Hydrogen Bonding towards Designing Organic-Salt-Based Supramolecular Gelators: Synthesis, Structures, and Anticancer Properties. Chem Asian J 2018; 13:1366-1378. [PMID: 29578316 DOI: 10.1002/asia.201800317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Indexed: 12/12/2022]
Abstract
A series of primary ammonium monocarboxylate (PAM) salts derived from β-alanine derivatives of pyrene and naphthalene acetic acid, along with the parent acids, were explored to probe the plausible role of orthogonal hydrogen bonding resulting from amide⋅⋅⋅amide and PAM synthons on gelation. Single-crystal X-ray diffraction (SXRD) studies were performed on two parent acids and five PAM salts in the series. The data revealed that orthogonal hydrogen bonding played an important role in gelation. Structure-property correlation based on SXRD and powder X-ray diffraction data also supported the working hypothesis upon which these gelators were designed. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and cell migration assay on a highly aggressive human breast cancer cell line, MDA-MB-231, revealed that one of the PAM salts in the series, namely, PAA.B2, displayed anticancer properties, and internalization of the gelator salt in the same cell line was confirmed by cell imaging.
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Affiliation(s)
- Poulami Chakraborty
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata-, 700032, West Bengal, India
| | - Parthasarathi Dastidar
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B Raja S.C. Mullick Road, Jadavpur, Kolkata-, 700032, West Bengal, India
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41
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Fang W, Zhang Y, Wu J, Liu C, Zhu H, Tu T. Recent Advances in Supramolecular Gels and Catalysis. Chem Asian J 2018; 13:712-729. [DOI: 10.1002/asia.201800017] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Weiwei Fang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Department of Chemistry; Fudan University; 2205 Songhu Road Shanghai 200438 China
| | - Yang Zhang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Department of Chemistry; Fudan University; 2205 Songhu Road Shanghai 200438 China
| | - Jiajie Wu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Department of Chemistry; Fudan University; 2205 Songhu Road Shanghai 200438 China
| | - Cong Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Department of Chemistry; Fudan University; 2205 Songhu Road Shanghai 200438 China
| | - Haibo Zhu
- School of Chemistry, Biology and Material Science; East China University of Technology; Nanchang 330013 China
| | - Tao Tu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials; Department of Chemistry; Fudan University; 2205 Songhu Road Shanghai 200438 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; Shanghai 200032 China
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42
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Roy R, Adalder TK, Dastidar P. Supramolecular Gels Derived from the Salts of Variously Substituted Phenylacetic Acid and Dicyclohexylamine: Design, Synthesis, Structures, and Dye Adsorption. Chem Asian J 2018; 13:552-559. [PMID: 29345067 DOI: 10.1002/asia.201701632] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/17/2018] [Indexed: 11/07/2022]
Abstract
A well-studied supramolecular synthon, namely, secondary ammonium monocarboxylate (SAM), was exploited to generate a new series of organic salts derived from variously substituted phenylacetic acid and dicyclohexylamine as potential low-molecular-weight gelators. As much as 25 % of the SAM salts under study were gelators. The gels were characterized by rheology, and the morphology of the gel networks was studied by high-resolution electron microscopy. Single-crystal and powder XRD data were employed to study structure-property (gelation) correlations. One of the gels could adsorb a hydrophobic dye (Nile Red) more efficiently than that of a hydrophilic dye (Calcein) from dimethyl sulfoxide; this might provide useful clues towards the development of stain-removing gels.
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Affiliation(s)
- Rajdip Roy
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India
| | - Tapas Kumar Adalder
- Department of Chemistry, Jhargram Raj College, Jhargram, 721507, West Bengal, India
| | - Parthasarathi Dastidar
- Department of Organic Chemistry, Indian Association for the Cultivation of Science (IACS), 2A and 2B, Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, West Bengal, India
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44
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Bag BG, Ghorai S, Panja SK, Dinda SK, Paul K. First in situ vesicular self-assembly of ‘binols’ generated by a two-component aerobic oxidation reaction. RSC Adv 2018; 8:29155-29163. [PMID: 35547996 PMCID: PMC9084448 DOI: 10.1039/c8ra06488a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 08/07/2018] [Indexed: 11/25/2022] Open
Abstract
Generation of vesicular self-assemblies from natural and synthetic components has been in the frontiers of research in recent years for an improved understanding of the self-assembly process and also because of its prospective and realized applications in the areas of advanced materials, biotechnology and medicine. In the present work, we report the first example of the in situ generation of vesicular self-assemblies during an aerobic coupling reaction. The two precursor 2-naphthol units, having hydrogen bond donor–acceptor groups with appended alkyl chains, yielded binol (2,2′-dihydroxy-1,1′-binaphthyl) derivatives by aerobic coupling that spontaneously self-assembled in situ, yielding vesicular self-assemblies and gels. The morphology of the self-assemblies has been characterized by various optical, electron and atomic force microscopic techniques. The vesicular self-assemblies obtained in the liquids were capable of entrapping fluorophores such as rhodamine-B and carboxy fluorescein including the anticancer drug doxorubicin. The entrapped fluorophores could also be released by sonication or by rupture of vesicles. The supramolecular gels obtained in binary solvent mixtures showed improved gelation abilities with increase in the alkyl chain lengths as reflected by their minimum gelator concentration (mgcs) values, gel to sol transition temperatures (Tgel) and rheology properties. The results described here are also the first demonstration of gelation during an aerobic coupling reaction. Binol derivatives, obtained by aerobic coupling of two 2-naphthol derivatives having H-bond donor–acceptor groups and appended alkyl chains, spontaneously self-assembled in situ yielding vesicular self-assemblies and gels.![]()
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Affiliation(s)
- Braja G. Bag
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Subrata Ghorai
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Saikat K. Panja
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Shaishab K. Dinda
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
| | - Koushik Paul
- Department of Chemistry and Chemical Technology
- Vidyasagar University
- Midnapore 721102
- India
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Parveen R, Maity N, Dastidar P. Simple Organic Salts Having a Naphthalenediimide (NDI) Core Display Multifunctional Properties: Gelation, Anticancer and Semiconducting Properties. Chem Asian J 2017; 13:170-180. [PMID: 29168620 DOI: 10.1002/asia.201701559] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 11/23/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Rumana Parveen
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S.C. Mullick Road Kolkata 700032 West Bengal India
| | - Nabasmita Maity
- Department of Polymer Science Unit; Indian Association for the Cultivation of Science; 2A & 2B Raja S.C. Mullick Road Kolkata 700032 West Bengal India
| | - Parthasarathi Dastidar
- Department of Organic Chemistry; Indian Association for the Cultivation of Science; 2A & 2B Raja S.C. Mullick Road Kolkata 700032 West Bengal India
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Parisi EI, Bonelli N, Carretti E, Giorgi R, Ingo GM, Baglioni P. Film forming PVA-based cleaning systems for the removal of corrosion products from historical bronzes. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2017-0204] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Abstract
This paper presents an innovative poly(vinyl)alcohol-based film forming system, specifically devised for the controllable and selective cleaning of copper-based artifacts. Traditional cleaning procedures are commonly performed using mechanical and/or chemical methods. Unfortunately, both these methods present some limitations related to both the poor selectivity and invasiveness in case of the mechanical procedure, and to the scarce control over the involved reactions when dealing with a chemical approach. The innovative system proposed in this work allows combining the advantages of chemical and mechanical treatments thanks to the confinement of a complexing agent (EDTA) within a fluid, polymeric matrix, that is able to form a solid thin film upon drying. After treatment, the polymeric film can be completely removed from the artwork through a gentle peeling action. In this contribution, the film formation mechanism was investigated by means of thermal analysis and rheology; the role of plasticizers, volatile solvent fraction, and quantity of loaded EDTA is also discussed. Finally, the results of cleaning tests performed on artificially aged samples, and on a real case study, the “Fontana dei Mostri Marini” by Pietro Tacca in Florence, are presented.
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Affiliation(s)
- Erica I. Parisi
- Department of Chemistry Ugo Schiff and CSGI , University of Florence , Via della Lastruccia 3, Sesto Fiorentino , 50019 Florence , Italy
| | - Nicole Bonelli
- Department of Chemistry Ugo Schiff and CSGI , University of Florence , Via della Lastruccia 3, Sesto Fiorentino , 50019 Florence , Italy
| | - Emiliano Carretti
- Department of Chemistry Ugo Schiff and CSGI , University of Florence , Via della Lastruccia 3, Sesto Fiorentino , 50019 Florence , Italy
| | - Rodorico Giorgi
- Department of Chemistry Ugo Schiff and CSGI , University of Florence , Via della Lastruccia 3, Sesto Fiorentino , 50019 Florence , Italy
| | - Gabriel M. Ingo
- Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR , Via Salaria Km 29.300-00015 Monterotondo Stazione (RM) , Italy
| | - Piero Baglioni
- Department of Chemistry Ugo Schiff and CSGI , University of Florence , Via della Lastruccia 3, Sesto Fiorentino , 50019 Florence , Italy
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Duncan TT, Berrie BH, Weiss RG. Soft, Peelable Organogels from Partially Hydrolyzed Poly(vinyl acetate) and Benzene-1,4-diboronic Acid: Applications to Clean Works of Art. ACS APPLIED MATERIALS & INTERFACES 2017; 9:28069-28078. [PMID: 28787129 DOI: 10.1021/acsami.7b09473] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We have developed soft, peelable organogels from 40% hydrolyzed poly(vinyl acetate) (40PVAc) and benzene-1,4-diboronic acid (BDBA). The organic liquids gelated include dimethyl sulfoxide, dimethylformamide, tetrahydrofuran, 2-ethoxyethanol, and methanol. The rheology of these soft materials can be tuned by altering the concentration of the polymer and/or crosslinker. Insights into the mechanisms leading to gelation were obtained from 1H NMR experiments, fluorescence measurements, and studies comparing properties of materials made from BDBA and phenylboronic acid, a molecule incapable of forming covalent crosslinks between the polymer chains. These organogels can be easily peeled off a surface, leaving no residue detectable by UV-vis spectroscopy. They are demonstrated to be effective at softening and removing deteriorated coatings from water-sensitive works of art and delicate surfaces. They have the needed characteristics to clean topographically complex surfaces: good contact with the surface, easy removal, and little to no residue after removal. A 2-ethoxyethanol organogel was used to remove oxidized varnish from a 16th century reliquary decorated with painted gold leaf, and an ethanol gel was used to remove solvent-resistant coatings from 16th and 18th century oil paintings.
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Affiliation(s)
| | - Barbara H Berrie
- Conservation Division, National Gallery of Art , Washington, DC 20565, United States
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Liang X, Zheng L, Li S, Fan X, Shen S, Hu D. Electrochemical removal of stains from paper cultural relics based on the electrode system of conductive composite hydrogel and PbO 2. Sci Rep 2017; 7:8865. [PMID: 28821778 PMCID: PMC5562847 DOI: 10.1038/s41598-017-08907-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 07/19/2017] [Indexed: 11/21/2022] Open
Abstract
Constructing methods for cleaning stains on paper artworks that meet the requirements of preservation of cultural relics are still challenging. In response to this problem, a novel electrochemical cleaning method and the preparation of corresponding electrodes were proposed. For this purpose, the conductive graphene (rGO)/polyacryamide (PAM)/montmorillonite (MMT) composite hydrogel as cathode and PbO2-based material as anode were prepared and characterized. The electrochemical cleaning efficiencies of real sample and mimicking paper artifacts were evaluated, and the effects of the electrochemical cleaning on paper itself were detected. Based on the above experiments, the following results were obtained. The composite hydrogel with attractive mechanical properties is mainly based on the hydrogen bond interactions between PAM chains and MMT. The results of cleaning efficiency revealed that the black mildew stains together with the yellowish foxing stains were almost completely eliminated within 6 min at 8 mA/cm2, and various stains formed by tideline, foxing, organic dyes and drinks could be thoroughly removed at 4 mA/cm2 within 5 min. In addition, the proposed cleaning method has advantages in local selectivity, easy control of cleaning course, and reusability, which represents a potential utility of this approach.
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Affiliation(s)
- Xingtang Liang
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
- School of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou, 535000, China
| | - Lizhen Zheng
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Shirong Li
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Xiaoyu Fan
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Shukun Shen
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Daodao Hu
- Engineering Research Center of Historical and Cultural Heritage Protection, Ministry of Education, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China.
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Septavaux J, Germain G, Leclaire J. Dynamic Covalent Chemistry of Carbon Dioxide: Opportunities to Address Environmental Issues. Acc Chem Res 2017. [PMID: 28644617 DOI: 10.1021/acs.accounts.7b00147] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Extraction and purification of basic chemicals from complex mixtures has been a persistent issue throughout the development of the chemical sciences. The chemical industry and academic research have grown over the centuries by following a deconstruction-reconstruction approach, reminiscent of the metabolism process. Chemists have designed and optimized extraction, purification, and transformation processes of molecules from natural deposits (fossil fuels, biomass, ores), in order to reassemble them into complex adducts. These highly selective and cost-effective techniques arose from developments in physical chemistry but also in supramolecular chemistry, long before the term was even coined. Thanks to the extremely diverse toolbox currently available to the scientific community, artificial molecular systems of increasing complexity can be built and integrated into high-technology products. If humanity has proven through the ages how gifted it can be at this deconstruction-reconstruction game, which has transformed the natural world to a human-shaped one, it has been confronted for more than a century by a new challenge: the deconstruction and reconstruction from a new type of deposit, the waste resulting from the mass production of disposable manufactured goods. In this Account, we will explore the potential contribution of controlled molecular and supramolecular self-assembly phenomena to the challenge of selective and efficient capture of valuable target molecules from mixtures found in postconsumer waste. While it may appear paradoxical to add more molecular ingredients to an already compositionally complex system in order to address a purification issue, we will compare the selectivity, yield, and cost of such an atypical procedure with traditional physical techniques. In the context of carbon dioxide capture or release, we will specifically focus on the coupling between this reversible covalent fixation of the gas by amines and an additional chemical equilibrium. This equilibrium may involve covalent or noncovalent bond formation between a supplementary species and either the unloaded reactant or the CO2-loaded product. Thereby, this new reactive species may act as a CO2 capture agonist or antagonist by either thermodynamically favoring the carbamation or decarbamation direction. Indeed, superagonism, the increase of CO2 loading per amine site upon carbamation beyond the theoretical limit of 0.5, can be achieved using tightly bound cationic metal counterions. In all cases, upon binding and adduct formation, a mutual selection process occurs between one member of the CO2-based dynamic combinatorial library and one agonist or antagonist, which can itself be contained in a complex mixture of analogues. If this adduct is the only species that, upon formation, can self-aggregate into a separate solid phase, selection and binding are accompanied by translocation, rendering the purification procedure operationally straightforward. This general strategy, based on a simple design of coupled molecular systems, may easily be implemented within new, disruptive technologies for selective extraction of target molecules, thereby providing a substantial environmental and economic benefit.
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Affiliation(s)
| | | | - Julien Leclaire
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, CPE Lyon, ICBMS UMR 5246, 43 Boulevard du 11 Novembre 1918, F-69622 Lyon, France
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Ammonium-Carbamate-Rich Organogels for the Preparation of Amorphous Calcium Carbonates. MINERALS 2017. [DOI: 10.3390/min7070110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Amine-CO2 chemistry is important for a range of different chemical processes, including carbon dioxide capture. Here, we studied how aspects of this chemistry could be used to prepare calcium carbonates. Chemically crosslinked organogels were first prepared by reacting hyperbranched polyethylene imine (PEI) dissolved in DMSO with carbon dioxide. The crosslinks of the organogel consisted of ammonium-carbamate ion pairs as was shown by IR spectroscopy. These carbamate-rich organogels were subsequently subjected to aqueous solutions of calcium acetate, and amorphous calcium carbonate (ACC) precipitated. The ACC did not crystalize during the mixing for up to 20 h, as was shown by a combination of IR spectroscopy, X-ray diffraction, scanning electron microscopy, and thermal analysis. Some PEI had been included or adsorbed on the ACC particles. Traces of calcite were observed in one sample that had been subjected to water in a work-up procedure.
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