1
|
Lavagna E, Salassi S, Bochicchio D, Rossi G. Dumbbells, chains, and ribbons: anisotropic self-assembly of isotropic nanoparticles. NANOSCALE 2023; 15:15153-15160. [PMID: 37671876 PMCID: PMC10540935 DOI: 10.1039/d3nr02384b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 08/16/2023] [Indexed: 09/07/2023]
Abstract
Functionalizing the surface of metal nanoparticles can assure their stability in solution or mediate their self-assembly into aggregates with controlled shapes. Here we present a computational study of the colloidal aggregation of gold nanoparticles (Au NPs) isotropically functionalized by a mixture of charged and hydrophobic ligands. We show that, by varying the relative proportion of the two ligands, the NPs form anisotropic aggregates with markedly different topologies: dumbbells, chains, or ribbons. In all cases, two kinds of connections keep the aggregates together: hydrophobic bonds and ion bridges. We show that the anisotropy of the aggregates derives from the NP shell reshaping due to the formation of the hydrophobic links, while ion bridges are accountable for the "secondary structure" of the aggregates. Our findings provide a general physical principle that can also be exploited in different self-assembled systems: anisotropic/directional aggregation can be achieved starting from isotropic objects with a soft, deformable surface.
Collapse
Affiliation(s)
- Enrico Lavagna
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - Sebastian Salassi
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - Davide Bochicchio
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - Giulia Rossi
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| |
Collapse
|
2
|
Nirwan VP, Lasak M, Ciepluch K, Fahmi A. Hybrid Nanomat: Copolymer Template CdSe Quantum Dots In Situ Stabilized and Immobilized within Nanofiber Matrix. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13040630. [PMID: 36838998 PMCID: PMC9959613 DOI: 10.3390/nano13040630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/26/2023] [Accepted: 01/31/2023] [Indexed: 05/12/2023]
Abstract
Fabrication and characterization of hybrid nanomats containing quantum dots can play a prominent role in the development of advanced biosensors and bio-based semiconductors. Owing to their size-dependent properties and controlled nanostructures, quantum dots (QDs) exhibit distinct optical and electronic characteristics. However, QDs include heavy metals and often require stabilizing agents which are toxic for biological applications. Here, to mitigate the use of toxic ligands, cadmium selenide quantum dots (CdSe QDs) were synthesized in situ with polyvinylpyrrolidone (PVP) at room temperature. The addition of PVP polymer provided size regulation, stability, and control over size distribution of CdSe QDs. The characterization of the optical properties of the CdSe QDs was performed using fluorescence and ultraviolet-visible (UV-Vis) spectroscopy. CdSe QDs exhibited a typical absorbance peak at 280 nm and a photoluminescence emission peak at 580 nm. Transmission electron microscopy (TEM) micrographs demonstrated that CdSe QDs having an average size of 6 ± 4 nm were obtained via wet chemistry method. CdSe QDs were immobilized in a blend of PVP and poly(L-lactide-co-ε-caprolactone) (PL-b-CL) copolymer that was electrospun to produce nanofibers. Scanning electron microscopy (SEM), thermal analyses and attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) were used to characterize properties of fabricated nanofibers. Both pristine and hybrid nanofibers possessed cylindrical geometry and rough surface features, facilitating increased surface area. Infrared absorption spectra showed a slight shift in absorbance peaks due to interaction of PVP-coated CdSe QDs and nanofiber matrix. The presence of CdSe QDs influenced the fiber diameter and their thermal stability. Further, in vitro biological analyses of hybrid nanofibers showed promising antibacterial effect and decline in cancer cell viability. This study offers a simple approach to obtain hybrid nanomats immobilized with size-controlled PVP-coated CdSe QDs, which have potential applications as biosensors and antibacterial and anticancer cell agents.
Collapse
Affiliation(s)
- Viraj P. Nirwan
- Faculty of Technology and Bionics, Rhine-Waal University of Applied Science, Marie-Curie-Straβe 1, 47533 Kleve, Germany
| | - Magdalena Lasak
- Division of Medical Biology, Jan Kochanowski University in Kielce, Uniwersytecka Street 7, 25-406 Kielce, Poland
| | - Karol Ciepluch
- Division of Medical Biology, Jan Kochanowski University in Kielce, Uniwersytecka Street 7, 25-406 Kielce, Poland
| | - Amir Fahmi
- Faculty of Technology and Bionics, Rhine-Waal University of Applied Science, Marie-Curie-Straβe 1, 47533 Kleve, Germany
- Correspondence: ; Tel.: +49-0282-1806-73634
| |
Collapse
|
3
|
Lionello C, Perego C, Gardin A, Klajn R, Pavan GM. Supramolecular Semiconductivity through Emerging Ionic Gates in Ion-Nanoparticle Superlattices. ACS NANO 2023; 17:275-287. [PMID: 36548051 PMCID: PMC9835987 DOI: 10.1021/acsnano.2c07558] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
The self-assembly of nanoparticles driven by small molecules or ions may produce colloidal superlattices with features and properties reminiscent of those of metals or semiconductors. However, to what extent the properties of such supramolecular crystals actually resemble those of atomic materials often remains unclear. Here, we present coarse-grained molecular simulations explicitly demonstrating how a behavior evocative of that of semiconductors may emerge in a colloidal superlattice. As a case study, we focus on gold nanoparticles bearing positively charged groups that self-assemble into FCC crystals via mediation by citrate counterions. In silico ohmic experiments show how the dynamically diverse behavior of the ions in different superlattice domains allows the opening of conductive ionic gates above certain levels of applied electric fields. The observed binary conductive/nonconductive behavior is reminiscent of that of conventional semiconductors, while, at a supramolecular level, crossing the "band gap" requires a sufficient electrostatic stimulus to break the intermolecular interactions and make ions diffuse throughout the superlattice's cavities.
Collapse
Affiliation(s)
- Chiara Lionello
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Claudio Perego
- Department
of Innovative Technologies, University of
Applied Sciences and Arts of Southern Switzerland, Polo Universitario
Lugano, Campus Est, Via
la Santa 1, 6962 Lugano-Viganello, Switzerland
| | - Andrea Gardin
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Rafal Klajn
- Department
of Organic Chemistry, Weizmann Institute
of Science, Rehovot 76100, Israel
| | - Giovanni M. Pavan
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
- Department
of Innovative Technologies, University of
Applied Sciences and Arts of Southern Switzerland, Polo Universitario
Lugano, Campus Est, Via
la Santa 1, 6962 Lugano-Viganello, Switzerland
| |
Collapse
|
4
|
Lavagna E, Bochicchio D, De Marco AL, Güven ZP, Stellacci F, Rossi G. Ion-bridges and lipids drive aggregation of same-charge nanoparticles on lipid membranes. NANOSCALE 2022; 14:6912-6921. [PMID: 35451442 PMCID: PMC9109710 DOI: 10.1039/d1nr08543c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/14/2022] [Indexed: 05/19/2023]
Abstract
The control of the aggregation of biomedical nanoparticles (NP) in physiological conditions is crucial as clustering may change completely the way they interact with the biological environment. Here we show that Au nanoparticles, functionalized by an anionic, amphiphilic shell, spontaneously aggregate in fluid zwitterionic lipid bilayers. We use molecular dynamics and enhanced sampling techniques to disentangle the short-range and long-range driving forces of aggregation. At short inter-particle distances, ion-mediated, charge-charge interactions (ion bridging) stabilize the formation of large NP aggregates, as confirmed by cryo-electron microscopy. Lipid depletion and membrane curvature are the main membrane deformations driving long-range NP-NP attraction. Ion bridging, lipid depletion, and membrane curvature stem from the configurational flexibility of the nanoparticle shell. Our simulations show, more in general, that the aggregation of same-charge membrane inclusions can be expected as a result of intrinsically nanoscale effects taking place at the NP-NP and NP-bilayer soft interfaces.
Collapse
Affiliation(s)
- Enrico Lavagna
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy. rossig.@fisica.unige.it
| | - Davide Bochicchio
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy. rossig.@fisica.unige.it
| | - Anna L De Marco
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy. rossig.@fisica.unige.it
| | - Zekiye P Güven
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Francesco Stellacci
- Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
- Bioengineering Institute, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Giulia Rossi
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy. rossig.@fisica.unige.it
| |
Collapse
|
5
|
Bian T, Gardin A, Gemen J, Houben L, Perego C, Lee B, Elad N, Chu Z, Pavan GM, Klajn R. Electrostatic co-assembly of nanoparticles with oppositely charged small molecules into static and dynamic superstructures. Nat Chem 2021; 13:940-949. [PMID: 34489564 PMCID: PMC7611764 DOI: 10.1038/s41557-021-00752-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 06/14/2021] [Indexed: 02/08/2023]
Abstract
Coulombic interactions can be used to assemble charged nanoparticles into higher-order structures, but the process requires oppositely charged partners that are similarly sized. The ability to mediate the assembly of such charged nanoparticles using structurally simple small molecules would greatly facilitate the fabrication of nanostructured materials and harnessing their applications in catalysis, sensing and photonics. Here we show that small molecules with as few as three electric charges can effectively induce attractive interactions between oppositely charged nanoparticles in water. These interactions can guide the assembly of charged nanoparticles into colloidal crystals of a quality previously only thought to result from their co-crystallization with oppositely charged nanoparticles of a similar size. Transient nanoparticle assemblies can be generated using positively charged nanoparticles and multiply charged anions that are enzymatically hydrolysed into mono- and/or dianions. Our findings demonstrate an approach for the facile fabrication, manipulation and further investigation of static and dynamic nanostructured materials in aqueous environments.
Collapse
Affiliation(s)
- Tong Bian
- Department of Organic Chemistry, Weizmann Institute of Science,
Rehovot 76100, Israel
| | - Andrea Gardin
- Department of Innovative Technologies, University of Applied
Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland,Department of Applied Science and Technology, Politecnico di Torino,
10129 Torino, Italy
| | - Julius Gemen
- Department of Organic Chemistry, Weizmann Institute of Science,
Rehovot 76100, Israel
| | - Lothar Houben
- Department of Chemical Research Support, Weizmann Institute of
Science, Rehovot 76100, Israel
| | - Claudio Perego
- Department of Innovative Technologies, University of Applied
Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland
| | - Byeongdu Lee
- X-ray Science Division, Advanced Photon Source, Argonne National
Laboratory, Lemont, IL 60439, USA
| | - Nadav Elad
- Department of Chemical Research Support, Weizmann Institute of
Science, Rehovot 76100, Israel
| | - Zonglin Chu
- Department of Organic Chemistry, Weizmann Institute of Science,
Rehovot 76100, Israel
| | - Giovanni M. Pavan
- Department of Innovative Technologies, University of Applied
Sciences and Arts of Southern Switzerland, CH-6928 Manno, Switzerland,Department of Applied Science and Technology, Politecnico di Torino,
10129 Torino, Italy
| | - Rafal Klajn
- Department of Organic Chemistry, Weizmann Institute of Science,
Rehovot 76100, Israel,
| |
Collapse
|
6
|
Ulloa J, Barberá J, Serrano JL. Controlled Growth of Dendrimer-Coated Gold Nanoparticles: A Solvent-Free Process in Mild Conditions. ACS OMEGA 2021; 6:348-357. [PMID: 33458486 PMCID: PMC7807749 DOI: 10.1021/acsomega.0c04662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 10/26/2020] [Indexed: 05/16/2023]
Abstract
Monodisperse dendrimer-coated gold nanoparticles with a spherical shape have been obtained by direct reduction of HAuCl4 with sodium borohydride in the presence of dodecanethiol as a stabilizer and subsequent functionalization by ligand exchange reaction with polybenzylic thiolated dendrons. The substitution pattern of the dendrimeric units plays a fundamental role in the rate of the functionalization exchange process and consequently conditions the size and the polydispersity of the NPs obtained. An ulterior growth process occurs by thermal stimuli (150 °C) in a solvent-free environment. This method, carried out in mild conditions, allows the formation of highly monodisperse gold NPs with different sizes for different time reactions, and we discuss the mechanisms involved in this process. Finally, we demonstrate the chemical composition and stability of our compounds by structural, thermal, and chemical characterization of the samples before and after thermal treatment.
Collapse
Affiliation(s)
- José
Antonio Ulloa
- Instituto
de Nanociencia y Materiales de Aragón (INMA), Departamento
de Química Orgánica, Universidad
de Zaragoza-CSIC, C/Pedro
Cerbuna 12, 50009 Zaragoza, Spain
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C Concepción, Chile
| | - Joaquín Barberá
- Instituto
de Nanociencia y Materiales de Aragón (INMA), Departamento
de Química Orgánica, Universidad
de Zaragoza-CSIC, C/Pedro
Cerbuna 12, 50009 Zaragoza, Spain
| | - José Luis Serrano
- Instituto
de Nanociencia y Materiales de Aragón (INMA), Departamento
de Química Orgánica, Universidad
de Zaragoza-CSIC, C/Pedro
Cerbuna 12, 50009 Zaragoza, Spain
| |
Collapse
|
7
|
Singhania A, Dutta M, Saha S, Sahoo P, Bora B, Ghosh S, Fujita D, Bandyopadhyay A. Speedy one-pot electrochemical synthesis of giant octahedrons from in situ generated pyrrolidinyl PAMAM dendrimer. SOFT MATTER 2020; 16:9140-9146. [PMID: 32926056 DOI: 10.1039/d0sm00819b] [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
A novel electrochemical synthesis via a radical generation pathway is described here for the generation of a quaternary megamer structure from secondary dendrimers. The reaction is rapid and completes in <5 min. We have used lower/higher generation poly(amido)amine (PAMAM) dendrimers with carboxylic acid groups at the terminals. A precise electrocatalytic reaction at >3.5 V activates the carboxylic groups to undergo anodic oxidation (-e-) and produce radical carboxylate anions on the dendrimer surface. The reaction further goes through a decarboxylative elimination. Successive self-assembly creates billions of polydispersed and extremely stable ∼500 nm octahedron nanostructures, which we failed to destroy even by using a 20 kV electron beam. This is a new route for the speedy synthesis of important futuristic materials of well-defined shape. It has applications in building designer organic crystals for solar cells, organic electronics, rapid protein gelation, rapid protein crystallization, etc.
Collapse
Affiliation(s)
- Anup Singhania
- Chemical Science & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam-785006, India. and Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST Campus, Jorhat, Assam 785006, India
| | - Mrinal Dutta
- PV Metrology Group, Advanced Materials Devices and Metrology Division, CSIR-National Physical Laboratory, New Delhi-110012, India and Academy of Scientific and Innovative Research (AcSIR), CSIR-NPL Campus, New Delhi-110012, India
| | - Supriya Saha
- Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST Campus, Jorhat, Assam 785006, India and Advanced Computation and Data Sciences Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam-785006, India
| | - Pathik Sahoo
- International Center for Materials and Nanoarchitectronics (MANA) and Research Center for Advanced Measurement and Characterization (RCAMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Japan
| | - Bharati Bora
- Chemical Science & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam-785006, India.
| | - Subrata Ghosh
- Chemical Science & Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam-785006, India. and Academy of Scientific and Innovative Research (AcSIR), CSIR-NEIST Campus, Jorhat, Assam 785006, India
| | - Daisuke Fujita
- Research Center for Advanced Measurement and Characterization (RCAMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Japan
| | - Anirban Bandyopadhyay
- International Center for Materials and Nanoarchitectronics (MANA) and Research Center for Advanced Measurement and Characterization (RCAMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Japan
| |
Collapse
|
8
|
Shavykin OV, Neelov IM, Borisov OV, Darinskii AA, Leermakers FAM. SCF Theory of Uniformly Charged Dendrimers: Impact of Asymmetry of Branching, Generation Number, and Salt Concentration. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00429] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- O. V. Shavykin
- St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Kronverkskiy pr. 49, St. Petersburg 197101, Russia
| | - I. M. Neelov
- St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Kronverkskiy pr. 49, St. Petersburg 197101, Russia
| | - O. V. Borisov
- St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Kronverkskiy pr. 49, St. Petersburg 197101, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi Prospect 31, V.O., St. Petersburg 199004, Russia
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux/UMR 5254, Pau 64053, France
| | - A. A. Darinskii
- St. Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University), Kronverkskiy pr. 49, St. Petersburg 197101, Russia
- Institute of Macromolecular Compounds, Russian Academy of Sciences, Bolshoi Prospect 31, V.O., St. Petersburg 199004, Russia
| | - F. A. M. Leermakers
- Physical Chemistry and Soft Matter, Wageningen University, Wageningen 6703 HB, The Netherlands
| |
Collapse
|
9
|
Quiñone D, Martínez S, Bozoglián F, Bazzicalupi C, Torres J, Veiga N, Bianchi A, Kremer C. Solution Studies and Crystal Structures of Heteropolynuclear Potassium/Copper Complexes with Phytate and Aromatic Polyamines: Self-Assembly through Coordinative and Supramolecular Interactions. Chempluschem 2020; 84:540-552. [PMID: 31943896 DOI: 10.1002/cplu.201900141] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/25/2019] [Indexed: 02/03/2023]
Abstract
Phytate (L12- ) is a relevant natural product. It interacts strongly with biologically relevant cations, due to the high negative charge exhibited in a wide pH range. The synthesis and crystal structures of the mixed-ligand Cu(II) polynuclear complexes K(H2 tptz)0.5 [Cu(H8 L)(tptz)] ⋅ 3.6H2 O (1), K(H2 O)3 {[Cu(H2 O)(bpca)]3 (H8 L)} ⋅ 1.75H2 O (2), and K1.5 (H2 O)2 [Cu(bpca)](H9.5 L) ⋅ 8H2 O (3) (tptz=2,4,6-tri(pyridin-2-yl)-1,3,5-triazine; Hbpca=bis(2-pyridylcarbonyl) amine) are reported herein. They were obtained by the use of an aromatic rigid amine, which satisfies some of the metal coordination sites and promotes the hierarchical assembly of 2D polymeric structures. Speciation of phytate-Cu(II)-Hbpca system and determination of complex stability constants were performed by means of potentiometric titrations, in 0.15 M NMe4 Cl at 37.0 °C, showing that, even in solution, this system is able to produce highly aggregated complexes, such as [Cu3 (bpca)3 (H7 L)]2- . Furthermore, the Cu(II)-mediated tptz hydrolysis was studied by UV-vis spectroscopy at room temperature in 0.15 M NMe4 Cl. Based on the equilibrium results and with the aid of molecular modelling tools, a plausible self-assembly process for 2 and 3 could be proposed.
Collapse
Affiliation(s)
- Delfina Quiñone
- Facultad de Química, Universidad de la República, Avenida Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Sebastián Martínez
- Facultad de Química, Universidad de la República, Avenida Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Fernando Bozoglián
- Institut Català d'Investigació Química, 16, Avinguda dels Països Catalans, 43007, Tarragona, Spain
| | - Carla Bazzicalupi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019, Sesto Fiorentino, Italy
| | - Julia Torres
- Facultad de Química, Universidad de la República, Avenida Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Nicolás Veiga
- Facultad de Química, Universidad de la República, Avenida Gral. Flores 2124, 11800, Montevideo, Uruguay
| | - Antonio Bianchi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia, 3, 50019, Sesto Fiorentino, Italy
| | - Carlos Kremer
- Facultad de Química, Universidad de la República, Avenida Gral. Flores 2124, 11800, Montevideo, Uruguay
| |
Collapse
|
10
|
Neranon K, Alberch L, Ramström O. Design, Synthesis and Self-Assembly of Functional Amphiphilic Metallodendrimers. ChemistryOpen 2020; 9:45-52. [PMID: 31921545 PMCID: PMC6948116 DOI: 10.1002/open.201900298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/20/2019] [Indexed: 12/16/2022] Open
Abstract
A new family of alkynylated, amphiphilic dendrimers consisting of amidoamine linkers connected to 5,5'-functionalized 2,2'-bipyridine cores has been developed and evaluated in the formation of metallodendrimers of different generations and in self-assembly protocols. A convergent synthetic strategy was applied to provide dumbbell-shaped amphiphilic dendrimers, where the 2,2'-bipyridine cores could be coordinated to FeII centers to afford corresponding metallodendrimers. The ability of the metallic- and non-metallic dendritic structures to self-assemble into functional supramolecular aggregates were furthermore evaluated in aqueous solution. Spherical aggregates with sizes of a few hundred nanometers were generally produced, where controlled disassembly of the metallodendrimers through decomplexation could be achieved.
Collapse
Affiliation(s)
- Kitjanit Neranon
- Department of ChemistryRoyal Institute of TechnologyTeknikringen 36S-10044StockholmSweden
| | - Laura Alberch
- Department of ChemistryRoyal Institute of TechnologyTeknikringen 36S-10044StockholmSweden
| | - Olof Ramström
- Department of ChemistryRoyal Institute of TechnologyTeknikringen 36S-10044StockholmSweden
- Department of ChemistryUniversity of Massachusetts LowellOne University AveLowell, MA01854USA
- Department of Chemistry and Biomedical SciencesLinnaeus UniversitySE-39182KalmarSweden
| |
Collapse
|
11
|
Chakraborty S, Berac CM, Kemper B, Besenius P, Speck T. Modeling Supramolecular Polymerization: The Role of Steric Effects and Hydrophobic Interactions. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01435] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saikat Chakraborty
- Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany
| | - Christian M. Berac
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
- Graduate School “Materials Science in Mainz”, Johannes Gutenberg-Universität Mainz, Staudingerweg 9, 55128 Mainz, Germany
| | - Benedict Kemper
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Pol Besenius
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
- Graduate School “Materials Science in Mainz”, Johannes Gutenberg-Universität Mainz, Staudingerweg 9, 55128 Mainz, Germany
| | - Thomas Speck
- Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany
- Graduate School “Materials Science in Mainz”, Johannes Gutenberg-Universität Mainz, Staudingerweg 9, 55128 Mainz, Germany
| |
Collapse
|
12
|
Torchi A, Bochicchio D, Pavan GM. How the Dynamics of a Supramolecular Polymer Determines Its Dynamic Adaptivity and Stimuli-Responsiveness: Structure-Dynamics-Property Relationships From Coarse-Grained Simulations. J Phys Chem B 2018. [PMID: 29543455 DOI: 10.1021/acs.jpcb.8b00428] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The rational design of supramolecular polymers that can adapt or respond in time to specific stimuli in a controlled way is interesting for many applications, but this requires understanding the molecular factors that make the material faster or slower in responding to the stimulus. To this end, it is necessary to study the dynamic adaptive properties at submolecular resolution, which is difficult at an experimental level. Here we show coarse-grained molecular dynamics simulations (<5 Å resolution) demonstrating how the dynamic adaptivity and stimuli responsiveness of a supramolecular polymer is controlled by the intrinsic dynamics of the assembly, which is in turn determined by the structure of the monomers. As a representative case, we focus on a water-soluble 1,3,5-benzenetricarboxamide (BTA) supramolecular polymer incorporating (charged) receptor monomers, experimentally seen to undergo dynamic clustering following the superselective binding to a multivalent recruiter. Our simulations show that the dynamic reorganization of the supramolecular structure proceeds via monomer diffusion on the dynamic fiber surface (exchange within the fiber). Rationally changing the structure of the monomers to make the fiber surface more or less dynamic allows tuning the rate of response to the stimulus and of supramolecular reconfiguration. Simple in silico experiments draw a structure-dynamics-property relationship revealing the key factors underpinning the dynamic adaptivity and stimuli-responsiveness of these supramolecular polymers. We come out with clear evidence that to master the bioinspired properties of these fibers, it is necessary to control their intrinsic dynamics, while the high-resolution of our molecular models permits us to show how.
Collapse
Affiliation(s)
- Andrea Torchi
- Department of Innovative Technologies , University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c , CH-6928 Manno , Switzerland
| | - Davide Bochicchio
- Department of Innovative Technologies , University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c , CH-6928 Manno , Switzerland
| | - Giovanni M Pavan
- Department of Innovative Technologies , University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c , CH-6928 Manno , Switzerland
| |
Collapse
|
13
|
Hong L, Nishihara T, Hijikata Y, Miyauchi Y, Itami K. Unidirectional molecular assembly alignment on graphene enabled by nanomechanical symmetry breaking. Sci Rep 2018; 8:2333. [PMID: 29402969 PMCID: PMC5799215 DOI: 10.1038/s41598-018-20760-z] [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: 01/15/2018] [Accepted: 01/23/2018] [Indexed: 11/10/2022] Open
Abstract
Precise fabrication of molecular assemblies on a solid surface has long been of central interest in surface science. Their perfectly oriented growth only along a desired in-plane direction, however, remains a challenge, because of the thermodynamical equivalence of multiple axis directions on a solid-surface lattice. Here we demonstrate the successful fabrication of an in-plane, unidirectional molecular assembly on graphene. Our methodology relies on nanomechanical symmetry breaking effects under atomic force microscopy tip scanning, which has never been used in molecular alignment. Individual one-dimensional (1D) molecular assemblies were aligned along a selected symmetry axis of the graphene lattice under finely-tuned scanning conditions after removing initially-adsorbed molecules. Experimental statistics and computational simulations suggest that the anisotropic tip scanning locally breaks the directional equivalence of the graphene surface, which enables nucleation of the unidirectional 1D assemblies. Our findings will open new opportunities in the molecular alignment control on various atomically flat surfaces.
Collapse
Affiliation(s)
- Liu Hong
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Taishi Nishihara
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yuh Hijikata
- Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan.,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan
| | - Yuhei Miyauchi
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Institute of Advanced Energy, Kyoto University, Uji, Kyoto, 611-0011, Japan.
| | - Kenichiro Itami
- JST-ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Graduate School of Science, Nagoya University, Chikusa, Nagoya, 464-8602, Japan. .,Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, 464-8602, Japan.
| |
Collapse
|
14
|
Eghtesadi SA, Kashfipour MA, Sun X, Zhang W, Lillard RS, Cheng SZD, Liu T. Hierarchical self-assembly of zwitterionic dendrimer-anionic surfactant complexes into multiple stimuli-responsive dynamic nanotubes. NANOSCALE 2018; 10:1411-1419. [PMID: 29302659 DOI: 10.1039/c7nr07950h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Zwitterionic materials attract a wide range of attention due to their unique molecular structures and properties, which make them an interesting candidate to solve multiple problems e.g. in biological and industrial applications. Here, we show that the incorporation of zwitterions into supramolecular assemblies of ionic building blocks can be an effective way to design responsive nanostructures with well-defined morphologies. We report the hierarchical assembly of stimuli-responsive nanotubes with tunable diameters in aqueous solutions via the selective attachment of anionic surfactants to dendrimers with uniquely engineered zwitterionic peripheries. We found that the packing number of the dendrimer-surfactant hybrids can be reversibly controlled, which will trigger their assembly into tubular-like structures. These tubes can grow up to the micro-scale, their diameter is responsive to the ionic strength of the solution, and they can reversibly assemble/disassemble with a change in pH. To the best of our knowledge, this is the first example of dynamic nanotubes formed through controlled ionic interactions involving zwitterionic dendrimers in solution. This not only provides a bottom-up method to make stimuli responsive and dynamic tubes but also introduce a pathway to design complicated nanostructures by controlling the electrostatic interactions of building blocks using zwitterionic functionalities.
Collapse
Affiliation(s)
- Seyed Ali Eghtesadi
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, USA.
| | | | | | | | | | | | | |
Collapse
|
15
|
Yang C, Chen L, Huang H, Ji T, Jiang Y, Chen X, Zhou C. Controllable fabrication of novel pH-, thermo-, and light-responsive supramolecular dendronized copolymers with dual self-assembly behavior. Polym Chem 2018. [DOI: 10.1039/c8py00448j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel tri-stimulus responsive supramolecular dendronized copolymers with dual self-assembly behavior are prepared, exhibiting fast and fully reversible phase transitions and trans–cis isomerization.
Collapse
Affiliation(s)
- ChangAn Yang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| | - Ling Chen
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| | - He Huang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| | - Tuo Ji
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| | - YingXiang Jiang
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| | - Xiaobo Chen
- Department of Chemistry
- University of Missouri – Kansas City
- Kansas City
- USA
| | - CongShan Zhou
- Department of Chemistry and Chemical Engineering
- Hunan Institute of Science and Technology
- Yueyang 414006
- PR China
| |
Collapse
|
16
|
Bochicchio D, Pavan GM. Effect of Concentration on the Supramolecular Polymerization Mechanism via Implicit-Solvent Coarse-Grained Simulations of Water-Soluble 1,3,5-Benzenetricarboxamide. J Phys Chem Lett 2017; 8:3813-3819. [PMID: 28759232 DOI: 10.1021/acs.jpclett.7b01649] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We report an implicit-solvent coarse-grained (CG) model for a water-soluble 1,3,5-benzenetricarboxamide (BTA) supramolecular polymer. The technical advances guaranteed by this CG model allow simulation of the self-assembly of 1000 BTA monomers and easy variation of the BTA concentration into the system down to experimental dilute conditions. In this way, we can monitor the mechanism of supramolecular polymerization as a function of the concentration at submolecular resolution exceeding the microsecond time scale. While increasing the concentration produces rapid formation of large disordered clusters that are then converted into BTA fibers, moving to very dilute concentrations favors early ordering of the oligomers in solution even at small sizes. Interestingly, we observe that below a certain concentration the oligomers that dynamically grow in solution during the self-assembly present the same level (and amplification) of order of prestacked equilibrated oligomers of the same size, meaning that concentration-dependent kinetic effects have disappeared from the polymerization mechanism.
Collapse
Affiliation(s)
- Davide Bochicchio
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| |
Collapse
|
17
|
Bochicchio D, Salvalaglio M, Pavan GM. Into the Dynamics of a Supramolecular Polymer at Submolecular Resolution. Nat Commun 2017; 8:147. [PMID: 28747661 PMCID: PMC5529520 DOI: 10.1038/s41467-017-00189-0] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 06/09/2017] [Indexed: 11/23/2022] Open
Abstract
To rationally design supramolecular polymers capable of self-healing or reconfiguring their structure in a dynamically controlled way, it is imperative to gain access into the intrinsic dynamics of the supramolecular polymer (dynamic exchange of monomers) while maintaining a high-resolution description of the monomer structure. But this is prohibitively difficult at experimental level. Here we show atomistic, coarse-grained modelling combined with advanced simulation approaches to characterize the molecular mechanisms and relative kinetics of monomer exchange in structural variants of a synthetic supramolecular polymer in different conditions. We can capture differences in supramolecular dynamics consistent with the experimental observations, revealing that monomer exchange in and out the fibres originates from the defects present in their supramolecular structure. At the same time, the submolecular resolution of this approach offers a molecular-level insight into the dynamics of these bioinspired materials, and a flexible tool to obtain structure-dynamics relationships for a variety of polymeric assemblies.Accessing the dynamics of soft self-assembled materials at high resolution is very difficult. Here the authors show atomistic and coarse-grained modelling combined with enhanced sampling to characterize the molecular mechanisms and kinetics of monomer exchange in synthetic supramolecular polymers.
Collapse
Affiliation(s)
- Davide Bochicchio
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928, Manno, Switzerland
| | - Matteo Salvalaglio
- Thomas Young Centre and Department of Chemical Engineering, University College London, London, WC1E 7JE, UK
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928, Manno, Switzerland.
| |
Collapse
|
18
|
Deiss-Yehiely E, Ortony JH, Qiao B, Stupp SI, Olvera de la Cruz M. Ion condensation onto self-assembled nanofibers. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Elad Deiss-Yehiely
- Simpson Querrey Institute for BioNanotechnology, Northwestern University; 303 E. Superior St., Suite 11-131 Chicago Illinois 60611
- Department of Materials Science and Engineering; Northwestern University; 2220 Campus Drive Evanston Illinois 60208
| | - Julia H. Ortony
- Simpson Querrey Institute for BioNanotechnology, Northwestern University; 303 E. Superior St., Suite 11-131 Chicago Illinois 60611
- Department of Materials Science and Engineering; Northwestern University; 2220 Campus Drive Evanston Illinois 60208
| | - Baofu Qiao
- Department of Materials Science and Engineering; Northwestern University; 2220 Campus Drive Evanston Illinois 60208
| | - Samuel I. Stupp
- Simpson Querrey Institute for BioNanotechnology, Northwestern University; 303 E. Superior St., Suite 11-131 Chicago Illinois 60611
- Department of Materials Science and Engineering; Northwestern University; 2220 Campus Drive Evanston Illinois 60208
- Department of Chemistry; Northwestern University; 2145 Sheridan Rd Evanston Illinois 60208
- Department of Chemical and Biological Engineering; Northwestern University; 2145 Sheridan Rd Evanston Illinois 60208
- Department of Medicine; Northwestern University; 251 East Huron Street Chicago Illinois 60611. Department of Biomedical Engineering; Northwestern University; 2145 Sheridan Rd Evanston Illinois 60208
| | - Monica Olvera de la Cruz
- Department of Materials Science and Engineering; Northwestern University; 2220 Campus Drive Evanston Illinois 60208
- Department of Chemistry; Northwestern University; 2145 Sheridan Rd Evanston Illinois 60208
- Department of Chemical and Biological Engineering; Northwestern University; 2145 Sheridan Rd Evanston Illinois 60208
- Department of Physics and Astronomy; Northwestern University; 2145 Sheridan Rd. Evanston Illinois 60208
| |
Collapse
|
19
|
Bochicchio D, Pavan GM. From Cooperative Self-Assembly to Water-Soluble Supramolecular Polymers Using Coarse-Grained Simulations. ACS NANO 2017; 11:1000-1011. [PMID: 27992720 DOI: 10.1021/acsnano.6b07628] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Supramolecular polymers, formed via noncovalent self-assembly of elementary monomers, are extremely interesting for their dynamic bioinspired properties. In order to understand their behavior, it is necessary to access their dynamics while maintaining high resolution in the treatment of the monomer structure and monomer-monomer interactions, which is typically a difficult task, especially in aqueous solution. Focusing on 1,3,5-benzenetricarboxamide (BTA) water-soluble supramolecular polymers, we have developed a transferable coarse-grained model that allows studying BTA supramolecular polymerization in water, while preserving remarkable consistency with the atomistic models in the description of the key interactions between the monomers (hydrophobic, H-bonding, etc.), self-assembly cooperativity, and amplification of order into the growing fibers. This permitted us to monitor the amplification of the key interactions between the monomers (including H-bonding) in the BTA fibers during the dynamic polymerization process. Our molecular dynamics simulations provide a picture of a stepwise cooperative polymerization mechanism, where initial fast hydrophobic aggregation of the BTA monomers in water is followed by the slower reorganization of these disordered aggregates into ordered directional oligomers. Supramolecular polymer growth then proceeds on a slower time scale. We challenged our models via comparison with the experimental evidence, capturing the effect of temperature variations and subtle changes in the monomer structure on the polymerization and on the properties of the fibers seen in the real systems. This work provides a multiscale spatiotemporal characterization of BTA self-assembly in water and a useful platform to study a variety of BTA-based supramolecular polymers toward structure-property relationships.
Collapse
Affiliation(s)
- Davide Bochicchio
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland , Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| |
Collapse
|
20
|
Garzoni M, Baker MB, Leenders CMA, Voets IK, Albertazzi L, Palmans ARA, Meijer EW, Pavan GM. Effect of H-Bonding on Order Amplification in the Growth of a Supramolecular Polymer in Water. J Am Chem Soc 2016; 138:13985-13995. [DOI: 10.1021/jacs.6b07530] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Matteo Garzoni
- Department
of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| | - Matthew B. Baker
- Institute
for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
- MERLN
Institute for Technology-Inspired Regenerative Medicine, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands
| | - Christianus M. A. Leenders
- Institute
for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Ilja K. Voets
- Institute
for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Lorenzo Albertazzi
- Institute for Bioengineering of Catalonia (IBEC), 08028 Barcelona, Spain
| | - Anja R. A. Palmans
- Institute
for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - E. W. Meijer
- Institute
for Complex Molecular Systems, Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands
| | - Giovanni M. Pavan
- Department
of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2c, CH-6928 Manno, Switzerland
| |
Collapse
|
21
|
Jones DE, Lund AM, Ghandehari H, Facelli JC. Molecular dynamics simulations in drug delivery research: Calcium chelation of G3.5 PAMAM dendrimers. COGENT CHEMISTRY 2016; 2:1229830. [PMID: 29177183 PMCID: PMC5699217 DOI: 10.1080/23312009.2016.1229830] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 08/24/2016] [Indexed: 11/18/2022]
Abstract
Poly(amido amine) (PAMAM) dendrimers have been considered as possible delivery systems for anticancer drugs. One potential advantage of these carriers would be their use in oral formulations, which will require absorption in the intestinal lumen. This may require the opening of tight junctions which may be enabled by reducing the Ca2+ concentration in the intestinal lumen, which has been shown as an absorption mechanism for EDTA (ethylenediaminetetraacetic acid). Using molecular dynamics simulations, we show that the G3.5 PAMAM dendrimers are able to chelate Ca2+ at similar proportions to EDTA, providing support to the hypothesis that oral formulations of PAMAM dendrimers could use this high chelating efficiency as a potential mechanism for permeating the tight junctions of the intestines if other formulation barriers could be overcome.
Collapse
Affiliation(s)
- David E. Jones
- Department of Biomedical Informatics, University of Utah, 421 Wakara, Salt Lake City, UT 84108, USA
| | - Albert M. Lund
- Department of Biomedical Informatics, University of Utah, 421 Wakara, Salt Lake City, UT 84108, USA
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - Hamidreza Ghandehari
- Departments of Bioengineering and Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, Salt Lake City, UT 84112, USA
| | - Julio C. Facelli
- Department of Biomedical Informatics, University of Utah, 421 Wakara, Salt Lake City, UT 84108, USA
| |
Collapse
|
22
|
Sen S, Jayappa RB, Zhu H, Forsyth M, Bhattacharyya AJ. A single cation or anion dendrimer-based liquid electrolyte. Chem Sci 2016; 7:3390-3398. [PMID: 29997834 PMCID: PMC6007127 DOI: 10.1039/c5sc04584c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Accepted: 01/28/2016] [Indexed: 11/21/2022] Open
Abstract
We propose here a novel liquid dendrimer-based single ion conductor as a potential alternative to conventional molecular liquid solvent-salt solutions in rechargeable batteries, sensors and actuators. A specific change from ester (-COOR) to cyano (-CN) terminated peripheral groups in generation-one poly(propyl ether imine) (G1-PETIM)-lithium salt complexes results in a remarkable switchover from a high cation (tLi+ = 0.9 for -COOR) to a high anion (tPF6- = 0.8 for -CN) transference number. This observed switchover draws an interesting analogy with the concept of heterogeneous doping, applied successfully to account for similar changes in ionic conductivity arising out of dispersion of insulator particle inclusions in weak inorganic solid electrolytes. The change in peripheral group simultaneously affects the effective ionic conductivity, with the room temperature ionic conductivity of PETIM-CN (1.9 × 10-5 Ω-1 cm-1) being an order of magnitude higher than PETIM-COOR (1.9 × 10-6 Ω-1 cm-1). Notably, no significant changes are observed in the lithium mobility even following changes in viscosity due to the change in the peripheral group. Changes in the peripheral chemical functionality directly influence the anion mobility, being lower in PETIM-COOR than in PETIM-CN, which ultimately becomes the sole parameter controlling the effective transport and electrochemical properties of the dendrimer electrolytes.
Collapse
Affiliation(s)
- Sudeshna Sen
- Solid State and Structural Chemistry Unit , Indian Institute of Science , Bangalore , 560012 , India .
| | - Rudresha B Jayappa
- Solid State and Structural Chemistry Unit , Indian Institute of Science , Bangalore , 560012 , India .
| | - Haijin Zhu
- Institute for Frontier Materials , Deakin University , Burwood , Waurn Ponds , VIC3216 , Australia
| | - Maria Forsyth
- Institute for Frontier Materials , Deakin University , Burwood , Waurn Ponds , VIC3216 , Australia
| | - Aninda J Bhattacharyya
- Solid State and Structural Chemistry Unit , Indian Institute of Science , Bangalore , 560012 , India .
| |
Collapse
|
23
|
Düring J, Gröhn F. Filamentous supramolecular structures with polyelectrolyte and cadmium sulfide. SOFT MATTER 2016; 12:1868-1875. [PMID: 26728575 DOI: 10.1039/c5sm02840j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, a new type of filamentous structures consisting of a generation 9 poly(amido amine) dendrimer (G9) and CdS is reported. The linearity of the interconnected dendrimers is a result of the electrostatic repulsion between the multiply charged dendrimer macroions. Structures have been investigated by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The internal structure of the CdS-fibers reveals information on the mechanism of the fiber formation. In contrast to previous systems with smaller generation poly(propylene imine)-dendrimers, Cd(2+) is here found to be responsible for the interconnection of G9. Furthermore, more complex supramolecular structures were built by associating the CdS-dendrimer hybrid fibers with different ionic dyes, displaying the versatility of this system for future nanotechnology applications such as optoelectronics or energy conversion.
Collapse
Affiliation(s)
- J Düring
- Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany.
| | | |
Collapse
|
24
|
Krieg E, Bastings MMC, Besenius P, Rybtchinski B. Supramolecular Polymers in Aqueous Media. Chem Rev 2016; 116:2414-77. [DOI: 10.1021/acs.chemrev.5b00369] [Citation(s) in RCA: 527] [Impact Index Per Article: 65.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | - Pol Besenius
- Institute
of Organic Chemistry, Johannes Gutenberg-Universität Mainz, Mainz 55128, Germany
| | - Boris Rybtchinski
- Department
of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| |
Collapse
|
25
|
Astachov V, Garzoni M, Danani A, Choy KL, Pavan GM, Fahmi A. In situ functionalization of self-assembled dendrimer nanofibers with cadmium sulfide quantum dots through simple ionic-substitution. NEW J CHEM 2016. [DOI: 10.1039/c5nj03580e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cadmium sulfide quantum dots (CdS-QDs) can be generated along poly(propylene imine) (PPI) dendrimer-based self-assembled nanofibers through a simple approach based on ionic substitution.
Collapse
Affiliation(s)
- V. Astachov
- University of Nottingham
- Department of Mechanical Materials and Manufacturing Engineering
- Nottingham
- UK
| | - M. Garzoni
- Department of Innovative Technologies
- University of Applied Sciences and Arts of Southern Switzerland
- 6928 Manno
- Switzerland
| | - A. Danani
- Department of Innovative Technologies
- University of Applied Sciences and Arts of Southern Switzerland
- 6928 Manno
- Switzerland
| | - K.-L. Choy
- University of Nottingham
- Department of Mechanical Materials and Manufacturing Engineering
- Nottingham
- UK
| | - G. M. Pavan
- Department of Innovative Technologies
- University of Applied Sciences and Arts of Southern Switzerland
- 6928 Manno
- Switzerland
| | - A. Fahmi
- University of Nottingham
- Department of Mechanical Materials and Manufacturing Engineering
- Nottingham
- UK
- Rhine-Waal University of Applied Sciences
| |
Collapse
|
26
|
Eghtesadi SA, Haso F, Kashfipour MA, Lillard RS, Liu T. Supramolecular Assembly of Poly(propyleneimine) Dendrimers Driven By Simple Monovalent Counterions. Chemistry 2015; 21:18623-30. [DOI: 10.1002/chem.201502852] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Indexed: 01/21/2023]
|
27
|
Molla MR, Rangadurai P, Pavan GM, Thayumanavan S. Experimental and theoretical investigations in stimuli responsive dendrimer-based assemblies. NANOSCALE 2015; 7:3817-37. [PMID: 25260107 PMCID: PMC4336240 DOI: 10.1039/c4nr04563g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Stimuli-responsive macromolecular assemblies are of great interest in drug delivery applications, as it holds the promise to keep the drug molecules sequestered under one set of conditions and release them under another. The former set of conditions could represent circulation, while the latter could represent a disease location. Over the past two decades, sizeable contributions to this field have come from dendrimers, which along with their monodispersity, provide great scope for structural modifications at the molecular level. In this paper, we briefly discuss the various synthetic strategies that have been developed so far to obtain a range of functional dendrimers. We then discuss the design strategies utilized to introduce stimuli responsive elements within the dendritic architecture. The stimuli itself are broadly classified into two categories, viz. extrinsic and intrinsic. Extrinsic stimuli are externally induced such as temperature and light variations, while intrinsic stimuli involve physiological aberrations such as variations in pH, redox conditions, proteins and enzyme concentrations in pathological tissues. Furthermore, the unique support from molecular dynamics (MD) simulations has been highlighted. MD simulations have helped back many of the observations made from assembly formation properties to rationalized the mechanism of drug release and this has been illustrated with discussions on G4 PPI (Poly propylene imine) dendrimers and biaryl facially amphiphilic dendrimers. The synergy that exists between experimental and theoretical studies open new avenues for the use of dendrimers as versatile drug delivery systems.
Collapse
Affiliation(s)
- Mijanur Rahaman Molla
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA. Fax: + 1 413 545 4490; Tel: + 1 413 545 1313
| | - Poornima Rangadurai
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA. Fax: + 1 413 545 4490; Tel: + 1 413 545 1313
| | - Giovanni M. Pavan
- Department of Innovative Technologies, University of Applied Science of Southern Switzerland, Galleria 2, Manno 6928, Switzerland. Tel: + 41 58 666 6676
| | - S. Thayumanavan
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA. Fax: + 1 413 545 4490; Tel: + 1 413 545 1313
| |
Collapse
|
28
|
Consequences of chirality on the dynamics of a water-soluble supramolecular polymer. Nat Commun 2015; 6:6234. [PMID: 25698667 PMCID: PMC4346625 DOI: 10.1038/ncomms7234] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 01/07/2015] [Indexed: 02/07/2023] Open
Abstract
The rational design of supramolecular polymers in water is imperative for their widespread use, but the design principles for these systems are not well understood. Herein, we employ a multi-scale (spatial and temporal) approach to differentiate two analogous water-soluble supramolecular polymers: one with and one without a stereogenic methyl. Initially aiming simply to understand the molecular behaviour of these systems in water, we find that while the fibres may look identical, the introduction of homochirality imparts a higher level of internal order to the supramolecular polymer. Although this increased order does not seem to affect the basic dimensions of the supramolecular fibres, the equilibrium dynamics of the polymers differ by almost an order of magnitude. This report represents the first observation of a structure/property relationship with regard to equilibrium dynamics in water-soluble supramolecular polymers.
Collapse
|
29
|
Furlan S, La Penna G, Appelhans D, Cangiotti M, Ottaviani MF, Danani A. Combined EPR and molecular modeling study of PPI dendrimers interacting with copper ions: effect of generation and maltose decoration. J Phys Chem B 2014; 118:12098-111. [PMID: 25247928 DOI: 10.1021/jp505420s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding the early onset of neurodegeneration is crucial to deploy specific treatments for patients before the process becomes irreversible. Copper has been proposed as a biomarker for many neurodegenerative disorders, being the ion released by pathologically unfolded proteins involved in many biochemical pathways. Dendrimers are macromolecules that bind metal ions with a large ion/ligand ratio, thus, allowing a massive collection of copper. This work provides structural information, obtained via molecular modeling and EPR, for the binding sites of copper in polypropyleneimine (PPI) dendrimers, especially in the maltose decorated form that has potential applications in diagnosis and therapies for various types of neurodegenerations. The analysis of the EPR spectra showed that, at the lowest Cu concentrations, the results are well supported by the calculations. Moreover, EPR analysis at increasing Cu(II) concentration allowed us to follow the saturation behavior of the interacting sites identified by the modeling study.
Collapse
Affiliation(s)
- Sara Furlan
- Department of Chemical and Pharmaceutical Sciences, University of Trieste , Via Giorgieri 1, I-34127 Trieste, Italy
| | | | | | | | | | | |
Collapse
|
30
|
Pavan GM. Modeling the Interaction between Dendrimers and Nucleic Acids: a Molecular Perspective through Hierarchical Scales. ChemMedChem 2014; 9:2623-31. [DOI: 10.1002/cmdc.201402280] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Indexed: 01/02/2023]
|
31
|
Abd-El-Aziz AS, Agatemor C, Etkin N. Sandwich complex-containing macromolecules: property tunability through versatile synthesis. Macromol Rapid Commun 2014; 35:513-59. [PMID: 24474608 DOI: 10.1002/marc.201300826] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/03/2013] [Indexed: 12/17/2022]
Abstract
Sandwich complexes feature unique properties as the physical and electronic properties of a hydrocarbon ligand or its derivative are integrated into the physical, electronic, magnetic, and optical properties of a metal. Incorporation of these complexes into macromolecules results in intriguing physical, electrical, and optical properties that were hitherto unknown in organic-based macromolecules. These properties are tunable through well-designed synthetic strategies. This review surveys many of the synthetic approaches that have resulted in tuning the properties of sandwich complex-containing macromolecules. While the past two decades have seen an ever-growing number of research publications in this field, gaps remain to be filled. Thus, we expect this review to stimulate research interest towards bridging these gaps, which include the insolubility of some of these macromolecules as well as expanding the scope of the sandwich complexes.
Collapse
Affiliation(s)
- Alaa S Abd-El-Aziz
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, Prince Edward Island, C1A 4P3, Canada
| | | | | |
Collapse
|
32
|
Garzoni M, Okuro K, Ishii N, Aida T, Pavan GM. Structure and shape effects of molecular glue on supramolecular tubulin assemblies. ACS NANO 2014; 8:904-914. [PMID: 24351029 DOI: 10.1021/nn405653k] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The possibility to arrange biological molecules into ordered nanostructures is an important issue in nano- and biotechnology. Nature offers a wide range of molecular "bricks" (e.g., proteins, oligonucleotides, etc.) that spontaneously assemble into more complex hierarchical systems with unique functionalities. Such molecular building blocks can be also used for the construction of nanomaterials with peculiar properties (e.g., DNA origami). In some cases, molecular glues able to bind biomolecules and to induce their assembly can be used to control the final structure and properties in a convenient way. Here we provide molecular-level description of how molecular glues designed to stick to the surface of microtubules (MTs) can control and transform the α/β-tubulin assembly upon temperature decreasing. By means of all-atom molecular dynamics (MD) simulations, we compared the adhesion to the MT surface of three molecular glues bearing the same guanidinium ion surface adhesive groups, but having different architecture, i.e., linear or dendritic backbone. Our evidence demonstrates that the adhesive properties of the different molecular glues are dependent on the shape they assume in solution. In particular, adhesion data from our MD simulations explain how globular- or linear-like molecular glues respectively stabilize MTs or transform them into a well-defined array of α/β-tubulin rings at 15 °C, where MTs naturally depolymerize. The comprehension of the MT transformation mechanism provides a useful rationale for designing ad hoc molecular glues to obtain ordered protein nanostructures from different biological materials.
Collapse
Affiliation(s)
- Matteo Garzoni
- Department of Innovative Technologies, University of Applied Science of Southern Switzerland , Galleria 2, Manno 6928, Switzerland
| | | | | | | | | |
Collapse
|
33
|
van Dongen MA, Vaidyanathan S, Banaszak Holl MM. PAMAM Dendrimers as Quantized Building Blocks for Novel Nanostructures. SOFT MATTER 2013; 9:10.1039/C3SM52250D. [PMID: 24319491 PMCID: PMC3852679 DOI: 10.1039/c3sm52250d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The desire to synthesize soft supramolecular structures with size scales similar to biological systems has led to work in assembly of polymeric nanomaterials. Recent advances in the isolation of generationally homogenous poly(amidoamine) (PAMAM) dendrimer enables their use as quantized building blocks. Here, we report their assembly into precise nanoclusters. In this work, click-functional ligands are stochastically conjugated to monomeric generation 5 PAMAM dendrimer and separated via reverse-phase HPLC to isolate dendrimers with precise numbers of click ligands per dendrimer particle. The click-ligand/dendrimer conjugates are then employed as modular building blocks for the synthesis of defined nanostructures. Complimentary click chemistry employing dendrimers with 1, 2, 3, or 4 ring-strained cyclooctyne ligands and dendrimers with 1 azide ligand were utilized to prepare megamer structures containing 2 to 5 ~30,000 kDa monomer units as characterized by mass spectrometry, size exclusion chromatography, and reverse-phase liquid chromatography. The resulting structures are flexible with masses ranging from 60,000 to 150,000 kDa, and are soluble in water, methanol, and dimethylsulfoxide.
Collapse
Affiliation(s)
- Mallory A. van Dongen
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - S. Vaidyanathan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Michigan Nanotechnology Institute for Medicine and Biological Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Mark M. Banaszak Holl
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Michigan Nanotechnology Institute for Medicine and Biological Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| |
Collapse
|
34
|
Lee C, Lo ST, Lim J, da Costa VCP, Ramezani S, Öz OK, Pavan GM, Annunziata O, Sun X, Simanek EE. Design, synthesis and biological assessment of a triazine dendrimer with approximately 16 Paclitaxel groups and 8 PEG groups. Mol Pharm 2013; 10:4452-61. [PMID: 24134039 DOI: 10.1021/mp400290u] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The synthesis and characterization of a generation three triazine dendrimer that displays a phenolic group at the core for labeling, up to eight 5 kDa PEG chains for solubility, and 16 paclitaxel groups is described. Three different diamine linkers--dipiperidine trismethylene, piperazine, and aminomethylpiperidine--were used within the dendrimer. To generate the desired stoichiometric ratio of 8 PEG chains to 16 paclitaxel groups, a monochlorotriazine was prepared with two paclitaxel groups attached through their 2'-hydroxyls using a linker containing a labile disulfide. This monochlorotriazine was linked to a dichlorotriazine with aminomethylpiperidine. The resulting dichlorotriazine bearing two paclitaxel groups could be reacted with the eight amines of the dendrimer. NMR and MALDI-TOF confirm successful reaction. The eight monochlorotriazines of the resulting material are used as the site for PEGylation affording the desired 2:1 stoichiometry. The target and intermediates were amenable to characterization by (1)H and (13)C NMR, and mass spectrometry. Analysis revealed that 16 paclitaxel groups were installed along with 5-8 PEG chains. The final construct is 63% PEG, 22% paclitaxel, and 15% triazine dendrimer. Consistent with previous efforts and computational models, 5 kDa PEG groups were essential for making the target water-soluble. Molecular dynamics simulations showed a high degree of hydration of the core, and a radius of gyration of 2.8 ± 0.2 nm. The hydrodynamic radius of the target was found to be 15.8 nm by dynamic light scattering, an observation indicative of aggregation. Drug release studies performed in plasma showed slow and identical release in mouse and rat plasma (8%, respectively). SPECT/CT imaging was used to follow biodistribution and tumor uptake. Using a two component model, the elimination and distribution half-lives were 2.65 h and 38.2 h, respectively. Compared with previous constructs, this dendrimer persists in the vasculature longer (17.33 ± 0.88% ID/g at 48 h postinjection), and showed higher tumor uptake. Low levels of dendrimer were observed in lung, liver, and spleen (~6% ID/g). Tumor saturation studies of small prostate cancer tumors (PC3) suggest that saturation occurs at a dose between 23.2 mg/kg and 70.9 mg/kg.
Collapse
Affiliation(s)
- Changsuk Lee
- Department of Chemistry, Texas Christian University , Fort Worth, Texas 76129, United States
| | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Rapakousiou A, Wang Y, Nzulu F, Djeda R, Pinaud N, Ruiz J, Astruc D. Ferrocenyl Dendrimers with Ionic Tethers and Dendrons. Organometallics 2013. [DOI: 10.1021/om400650s] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Amalia Rapakousiou
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Yanlan Wang
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Frida Nzulu
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Rodrigue Djeda
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Noël Pinaud
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Jaime Ruiz
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, UMR CNRS No. 5255, University of Bordeaux, 33405 Talence Cedex, France
| |
Collapse
|
36
|
Simanek EE, Enciso AE, Pavan GM. Computational design principles for the discovery of bioactive dendrimers: [s]-triazines and other examples. Expert Opin Drug Discov 2013; 8:1057-69. [PMID: 23826946 DOI: 10.1517/17460441.2013.813479] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Chemistry yields dendrimers of many classes and compositions. Translating this synthetic success to bioactivity is significantly aided by the use of computational modeling and our knowledge of the three-dimensional shapes of these macromolecules. AREAS COVERED This review discusses the lessons learned during the investigations of [s]-triazine dendrimers. Specifically, the article focuses on the evolving role that computational models have taken in the exploration of these macromolecules. These lessons, furthermore, can be generalized across many dendrimer classes. EXPERT OPINION Computational models and the resulting structural data from molecular dynamics simulations provide insights into: shape, solvent penetration, shielding of biolabile linkers, and the density of hydrophobic patches. These models have evolved from artistic representations, through bases for rationalization, to hypothesis-generating tools that drive synthesis. With further advances expected in both software and hardware the answer to the question, 'What does a specific dendrimer look like in solution?' is becoming increasingly clear. Moreover, the authors believe that answer to this question lies at the heart of the design of bioactive dendrimers.
Collapse
Affiliation(s)
- Eric E Simanek
- Texas Christian University, Department of Chemistry , 2800 South University Drive, Fort Worth, TX 76129, USA.
| | | | | |
Collapse
|
37
|
Bazzicalupi C, Bianchi A, Giorgi C, Gratteri P, Mariani P, Valtancoli B. Metal Ion Binding by a G-2 Poly(ethylene imine) Dendrimer. Ion-Directed Self-Assembling of Hierarchical Mono- and Two-Dimensional Nanostructured Materials. Inorg Chem 2013; 52:2125-37. [DOI: 10.1021/ic3025292] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Carla Bazzicalupi
- Department of Chemistry “Ugo
Schiff”, University of Florence,
Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Antonio Bianchi
- Department of Chemistry “Ugo
Schiff”, University of Florence,
Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Claudia Giorgi
- Department of Chemistry “Ugo
Schiff”, University of Florence,
Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Paola Gratteri
- Department of NEUROFARBA, Pharmaceutical and Nutraceutical Section, and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy
| | - Palma Mariani
- Department of Chemistry “Ugo
Schiff”, University of Florence,
Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Barbara Valtancoli
- Department of Chemistry “Ugo
Schiff”, University of Florence,
Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| |
Collapse
|
38
|
Lim J, Turkbey B, Bernardo M, Bryant LH, Garzoni M, Pavan GM, Nakajima T, Choyke PL, Simanek EE, Kobayashi H. Gadolinium MRI contrast agents based on triazine dendrimers: relaxivity and in vivo pharmacokinetics. Bioconjug Chem 2012; 23:2291-9. [PMID: 23035964 PMCID: PMC3586605 DOI: 10.1021/bc300461r] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Four gadolinium (Gd)-based macromolecular contrast agents, G3-(Gd-DOTA)(24), G5-(Gd-DOTA)(96), G3-(Gd-DTPA)(24), and G5-(Gd-DTPA)(96), were prepared that varied in the size of dendrimer (generation three and five), the type of chelate group (DTPA or DOTA), and the theoretical number of metalated chelates (24 and 96). Synthesis relied on a dichlorotriazine derivatized with a DOTA or DTPA ligand that was incorporated into the dendrimer and ultimately metalated with Gd ions. Paramagnetic characteristics and in vivo pharmacokinetics of all four contrast agents were investigated. The DOTA-containing agents, G3-(Gd-DOTA)(24) and G5-(Gd-DOTA)(96), demonstrated exceptionally high r1 relaxivity values at off-peak magnetic fields. Additionally, G5-(Gd-DOTA)(96) showed increased r1 relaxivity in serum compared to that in PBS, which was consistent with in vivo images. While G3-(Gd-DOTA)(24) and G3-(Gd-DTPA)(24) were rapidly excreted into the urine, G5-(Gd-DOTA)(96) and G5-(Gd-DTPA)(96) did not clear as quickly through the kidneys. Molecular simulation of the DOTA-containing dendrimers suggests that a majority of the metalated ligands are accessible to water. These triazine dendrimer-based MRI contrast agents exhibit several promising features such as high in vivo r1 relaxivity, desirable pharmacokinetics, and well-defined structure.
Collapse
Affiliation(s)
- Jongdoo Lim
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76129
| | - Baris Turkbey
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Marcelino Bernardo
- SAIC-Frederick, Inc., NCI-Frederick, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702
| | - L. Henry Bryant
- Laboratory of Diagnostic Radiology Research, Radiology & Imaging Sciences, Warren Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892
| | - Matteo Garzoni
- Department of Innovative Technologies, University of Applied Science of Southern Switzerland, Galleria 2, Manno 6928, Switzerland (CH)
| | - Giovanni M. Pavan
- Department of Innovative Technologies, University of Applied Science of Southern Switzerland, Galleria 2, Manno 6928, Switzerland (CH)
| | - Takahito Nakajima
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Peter L. Choyke
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Eric E. Simanek
- Department of Chemistry, Texas Christian University, Fort Worth, TX 76129
| | - Hisataka Kobayashi
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892
| |
Collapse
|