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Das K, Sappati S, Bisht GS, Hazra P. Proton-Coupled Electron Transfer in the Aqueous Nanochannels of Lyotropic Liquid Crystals: Interplay of H-Bonding and Polarity Effects. J Phys Chem Lett 2021; 12:2651-2659. [PMID: 33689368 DOI: 10.1021/acs.jpclett.1c00207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A molecular-level description of the aqueous nanochannels in lyotropic liquid crystals (LLCs) is crucial for their widespread utilization in diverse fields. Herein, the polarity and hydrogen bonding effects of LLC water molecules have been simultaneously explored using a single probe, 4'-N,N-dimethylamino-3-hydroxyflavone (DMA3HF), by the unique multiparametric sensitivity of the excited state proton-coupled electron transfer (PCET) phenomenon. The decreased ESIPT efficiency and the significantly retarded ESIPT dynamics (>20 times) of DMA3HF in the LLC phases suggests the dominant influence of strong hydrogen-bonded solute-solvent complexes that leads to a high activation barrier for ESIPT in the mesophases. The effects of hydrogen bonding on ESIPT have been elucidated by enhanced sampling techniques based on classical MD simulations of DMA3HF in explicit water. ESIPT via an extended hydrogen-bonded water wire is associated with a significantly high ESIPT activation barrier, substantiating the experimentally observed slow ESIPT dynamics inside the LLCs.
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Affiliation(s)
- Konoya Das
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | | | - Girish Singh Bisht
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
| | - Partha Hazra
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India
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2
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Ruiz-Fernández ÁR, Villanelo F, Gutierrez-Maldonado SE, Pareja-Barrueto C, Weiss-López BE, Perez-Acle T. l-DOPA modulates the kinetics but not the thermodynamic equilibrium of TTA +amphiphiles forming lyotropic nematic liquid crystals. RSC Adv 2020; 10:15366-15374. [PMID: 35495477 PMCID: PMC9052327 DOI: 10.1039/d0ra00764a] [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: 01/24/2020] [Accepted: 03/03/2020] [Indexed: 11/21/2022] Open
Abstract
l-DOPA modulates the dive in mechanism of bicelles with potential use as drug delivery systems.
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Affiliation(s)
| | - Felipe Villanelo
- Computational Biology Lab
- Fundación Ciencia & Vida
- Santiago
- Chile
- Centro Interdisciplinario de Neurociencia
| | | | - Claudia Pareja-Barrueto
- Computational Biology Lab
- Fundación Ciencia & Vida
- Santiago
- Chile
- Centro Interdisciplinario de Neurociencia
| | | | - Tomas Perez-Acle
- Computational Biology Lab
- Fundación Ciencia & Vida
- Santiago
- Chile
- Centro Interdisciplinario de Neurociencia
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3
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Ferrarese Lupi F, Giammaria TJ, Miti A, Zuccheri G, Carignano S, Sparnacci K, Seguini G, De Leo N, Boarino L, Perego M, Laus M. Hierarchical Order in Dewetted Block Copolymer Thin Films on Chemically Patterned Surfaces. ACS NANO 2018; 12:7076-7085. [PMID: 29952543 DOI: 10.1021/acsnano.8b02832] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We investigated the dewetting process on flat and chemically patterned surfaces of ultrathin films (thickness between 2 and 15 nm) of a cylinder forming polystyrene- block-poly(methyl methacrylate) (PS- b-PMMA) spin coated on poly(styrene- r-methyl methacrylate) random copolymers (RCPs). When the PS- b-PMMA film dewets on a 2 nm-thick RCP layer, the ordering of the hexagonally packed PMMA cylinders in the dewetted structures extends over distances far exceeding the correlation length obtained in continuous block copolymer (BCP) films. As a result, micrometer-sized circular droplets featuring defectless single grains of self-assembled PS- b-PMMA with PMMA cylinders perpendicularly oriented with respect to the substrate are generated and randomly distributed on the substrate. Additionally, alignment of the droplets along micrometric lines was achieved by performing the dewetting process on large-scale chemically patterned stripes of 2 nm thick RCP films by laser lithography. By properly adjusting the periodicity of the chemical pattern, it was possible to tune and select the geometrical characteristics of the dewetted droplets in terms of maximum thickness, contact angle and diameter while maintaining the defectless single grain perpendicular cylinder morphology of the circular droplets.
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Affiliation(s)
- Federico Ferrarese Lupi
- Nanoscience and Materials Division , Istituto Nazionale di Ricerca Metrologica , Strada delle Cacce 91 , 10135 Torino , Italy
| | - Tommaso Jacopo Giammaria
- CNR-IMM , Unit of Agrate Brianza , Via C. Olivetti 2 , 20864 Agrate Brianza , Italy
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT) , Università del Piemonte Orientale "A. Avogadro" , Viale T. Michel 11 , 1512 Alessandria , Italy
| | - Andrea Miti
- Dipartimento di Farmacia e Biotecnologie e Istituto di Nanoscienze del CNR (S3-Modena) , Via Irnerio, 48 , 40126 Bologna , Italy
| | - Giampaolo Zuccheri
- Dipartimento di Farmacia e Biotecnologie e Istituto di Nanoscienze del CNR (S3-Modena) , Via Irnerio, 48 , 40126 Bologna , Italy
| | | | - Katia Sparnacci
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT) , Università del Piemonte Orientale "A. Avogadro" , Viale T. Michel 11 , 1512 Alessandria , Italy
| | - Gabriele Seguini
- CNR-IMM , Unit of Agrate Brianza , Via C. Olivetti 2 , 20864 Agrate Brianza , Italy
| | - Natascia De Leo
- Nanoscience and Materials Division , Istituto Nazionale di Ricerca Metrologica , Strada delle Cacce 91 , 10135 Torino , Italy
| | - Luca Boarino
- Nanoscience and Materials Division , Istituto Nazionale di Ricerca Metrologica , Strada delle Cacce 91 , 10135 Torino , Italy
| | - Michele Perego
- CNR-IMM , Unit of Agrate Brianza , Via C. Olivetti 2 , 20864 Agrate Brianza , Italy
| | - Michele Laus
- Dipartimento di Scienze e Innovazione Tecnologica (DISIT) , Università del Piemonte Orientale "A. Avogadro" , Viale T. Michel 11 , 1512 Alessandria , Italy
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4
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Malgras V, Ataee-Esfahani H, Wang H, Jiang B, Li C, Wu KCW, Kim JH, Yamauchi Y. Nanoarchitectures for Mesoporous Metals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:993-1010. [PMID: 26515804 DOI: 10.1002/adma.201502593] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 07/28/2015] [Indexed: 05/21/2023]
Abstract
The field of mesoporous metal nanoarchitectonics offers several advantages which cannot be found elsewhere. These materials have been showcasing impressive enhancements of their electrochemical properties for further implementation, compared to their micro- and macroporous counterparts. Since the last few decades, various methods have been developed to achieve narrow pore size distribution with a tunable porosity and particle morphology. While hard templates offer a reliable and intuitive approach to synthesize mesoporous metals, the complexity of the technique and the use of harmful chemicals pushed several research groups to focus in other directions. For example, soft templates (e.g., lyotropic crystals, micelles assemblies) and solution phase methods (requiring to control reduction reactions) offer more and more possibilities in terms of available compositions and morphologies. Indeed, various metal (Pt, Pd, Au, Ru, etc.) can now be synthesized as dendritic, core@shell, hollow or polyhedral nanoparticles, with single- or multicomponents, alloyed or not, with unprecedented electrochemical activity.
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Affiliation(s)
- Victor Malgras
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hamed Ataee-Esfahani
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hongjing Wang
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Bo Jiang
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan
| | - Cuiling Li
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Kevin C-W Wu
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Jung Ho Kim
- Institute for Superconducting and Electronic Materials, University of Wollongong North Wollongong, New South Wales, 2500, Australia
| | - Yusuke Yamauchi
- National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan
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Ruiz-Fernández AR, López-Cascales JJ, Giner-Casares JJ, Araya-Maturana R, Díaz-Baños FG, Muñoz-Gacitúa D, Weiss-López BE. Effect of shape and bending modulus on the properties of nematic lyotropic liquid crystals. RSC Adv 2016. [DOI: 10.1039/c5ra24019k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Variation in the structure of the molecular aggregate associated with the increase of the TTAC concentration in the liquid crystal.
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Affiliation(s)
| | - J. J. López-Cascales
- Uni. Politécnica de Cartagena
- Grupo de Bioinformática y Macromoléculas (BioMac)
- 30203 Cartagena
- Spain
| | - J. J. Giner-Casares
- CIC biomaGUNE
- Biofunctional Nanomaterials – Laboratory 6 Parque tecnológico de San Sebastián
- 20009 Donostia – San Sebastián
- Spain
| | | | - F. G. Díaz-Baños
- Uni. de Murcia
- Fac. de Química
- Dep. de Química Física
- 30100 Espinardo
- Spain
| | - D. Muñoz-Gacitúa
- Uni. de Chile
- Fac. de Ciencias
- Departamento de Química
- Santiago
- Chile
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