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Tomasella P, Lucifora G, Ruffino R, Pandino I, Trusso Sfrazzetto G, Tuccitto N, Li-Destri G. Role of Density and Conformational Composition in the Surface-to-Bulk Molecular Dosing of Photosensitive Surfactant Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:17517-17525. [PMID: 39119985 DOI: 10.1021/acs.langmuir.4c01699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
Poorly water-soluble photosensitive monolayers might enable very precise control of the rate and number of desorbing molecules by controlling both the monolayer density and conformational composition. In this perspective, we systematically characterized the interfacial behavior of Langmuir monolayers consisting of a poorly water-soluble azobenzene-containing surfactant as a function of its trans/cis ratio. Precise control of the conformational ratio was achieved by controlling the UV irradiation time, allowing researchers to investigate compositions spanning from 100% trans to 90% cis. Our results demonstrate that in 100% trans monolayers, molecules do not desorb with compression until a threshold area is reached. Instead, the number of molecules desorbing in mixed trans-cis monolayers can be modulated by controlling both the composition and the compression rate. Additionally, the desorption rate at constant density is also strongly composition-dependent, and it accounts for two different regimes with two different characteristic times. We will show that trans molecules mostly desorb according to the slow regime while cis molecules conform to the fast one, but the two conformers mutually influence each other.
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Affiliation(s)
- Pascal Tomasella
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN) and CSGI, Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
| | - Giovanni Lucifora
- Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
| | - Roberta Ruffino
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN) and CSGI, Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
| | - Irene Pandino
- Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
| | | | - Nunzio Tuccitto
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN) and CSGI, Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
| | - Giovanni Li-Destri
- Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN) and CSGI, Department of Chemical Sciences, University of Catania, 95125 Catania, Italy
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Cao BP, Shi XW, Ding H, Wu YM, Matsumoto K, Okamoto H, Xiao Q. Multi-response gelation based on the molecular assembly of Sudan I dye derivatives for phase selective gelators and chemosensors. RSC Adv 2022; 12:33589-33597. [PMID: 36505691 PMCID: PMC9682489 DOI: 10.1039/d2ra05545g] [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: 09/03/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022] Open
Abstract
Sudan I dye-based smart low molecular weight gelators with/without a perfluoroalkyl group have been successfully synthesized and characterized by rheological measurements, scanning electron microscopy (SEM), IR, and NMR spectroscopies. The gelation behaviors in response to temperature, pH changes, metal cations, and UV-vis light irradiation are investigated. Compounds 1 and 2 could selectively sense the Cu2+ cation in the presence of other metal cations. Moreover, compound 2 with a perfluoroalkyl group shows phase selective gelation ability. This work also provides a valuable reference for exploiting photosensitive materials as chemosensors.
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Affiliation(s)
- Ban-Peng Cao
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal UniversityNanchang 330013China
| | - Xue-Wen Shi
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal UniversityNanchang 330013China
| | - Haixin Ding
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal UniversityNanchang 330013China
| | - Ya-Min Wu
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal UniversityNanchang 330013China
| | - Kenta Matsumoto
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University2-16-1 TokiwadaiUbe 755-8611Japan
| | - Hiroaki Okamoto
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University2-16-1 TokiwadaiUbe 755-8611Japan
| | - Qiang Xiao
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal UniversityNanchang 330013China
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Wu W, Wang J, Zhou Y, Sun Y, Zhou X, Zhang A. Design, synthesis and application of short-chained perfluorinated nitrogenous heterocyclic surfactants for hydrocarbon subphases. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Grousson E, Mahler F, Keller S, Contino-Pépin C, Durand G. Hybrid Fluorocarbon-Hydrocarbon Surfactants: Synthesis and Colloidal Characterization. J Org Chem 2021; 86:14672-14683. [PMID: 34609857 DOI: 10.1021/acs.joc.1c01493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four double-tailed hybrid fluorocarbon-hydrocarbon (F-H) surfactants with a poly(ethylene glycol) (PEG) polar headgroup were synthesized. The hydrophobic scaffold consists of an amino acid core, onto which were grafted both fluorocarbon and hydrocarbon chains of different lengths. The PEG polar head was connected to the hydrophobic scaffold through a copper(I)-mediated click reaction. The four derivatives exhibit aqueous solubility >100 g/L and self-assemble into micellar aggregates with micromolar critical micellar concentration (CMC) values, as demonstrated by isothermal titration calorimetry (ITC), surface tension (ST) measurements, and steady-state fluorescence spectroscopy. The CMC value decreased by a factor of ∼6 for each additional pair of CH2 groups, whereas a decrease by a factor of ∼2.5 was observed when the size of the PEG polar head was reduced from 2000 to 750 g/mol. Dynamic light scattering (DLS) showed unimodal micelle populations with hydrodynamic diameters of 10-15 nm, in agreement with results obtained from size-exclusion chromatography (SEC). The aggregation number increased with the hydrocarbon chain length but decreased with increasing PEG chain lengths. The combination in one molecular design of both low CMC and high water solubility makes these new surfactants promising systems for novel drug-delivery systems.
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Affiliation(s)
- Emilie Grousson
- Institut des Biomolécules Max Mousseron (IBMM)─UMR5247, 34093 Montpellier, France.,Equipe Chimie Bioorganique et Systèmes Amphiphiles (CBSA), Avignon Université, 84000 Avignon, France
| | - Florian Mahler
- Molecular Biophysics, Technische Universität Kaiserslautern, (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany
| | - Sandro Keller
- Molecular Biophysics, Technische Universität Kaiserslautern, (TUK), Erwin-Schrödinger-Str. 13, 67663 Kaiserslautern, Germany.,Biophysics, Institute of Molecular Biosciences (IMB), NAWI Graz, University of Graz, Humboldtstr. 50/III, 8010 Graz, Austria.,Field of Excellence BioHealth, University of Graz, 8010 Graz, Austria.,BioTechMed-Graz, 8010 Graz, Austria
| | - Christiane Contino-Pépin
- Institut des Biomolécules Max Mousseron (IBMM)─UMR5247, 34093 Montpellier, France.,Equipe Chimie Bioorganique et Systèmes Amphiphiles (CBSA), Avignon Université, 84000 Avignon, France
| | - Grégory Durand
- Institut des Biomolécules Max Mousseron (IBMM)─UMR5247, 34093 Montpellier, France.,Equipe Chimie Bioorganique et Systèmes Amphiphiles (CBSA), Avignon Université, 84000 Avignon, France
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