1
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Ortuño AM, Reiné P, Resa S, Álvarez de Cienfuegos L, Blanco V, Paredes JM, Mota AJ, Mazzeo G, Abbate S, Ugalde JM, Mujica V, Longhi G, Miguel D, Cuerva JM. Extended enantiopure ortho-phenylene ethylene ( o-OPE)-based helical systems as scaffolds for supramolecular architectures: a study of chiroptical response and its connection to the CISS effect. Org Chem Front 2021. [DOI: 10.1039/d1qo00822f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Versatile enantiopure helical systems are described and are of interest owing to their intense chiroptical responses, their attractive architecture for metallosupramolecular chemistry and CISS effect.
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Affiliation(s)
- Ana M. Ortuño
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Pablo Reiné
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Sandra Resa
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Victor Blanco
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | | | - Antonio J. Mota
- Department of Inorganic Chemistry, Faculty of Science, UGR-UEQ
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Jesus M. Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Vladimiro Mujica
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
- Arizona State University, School of Molecular Sciences, Tempe, AZ 85287, USA
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Delia Miguel
- Department of Physical Chemistry, Faculty of Pharmacy, UGR-UEQ
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
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2
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Rinaldi S. The Diverse World of Foldamers: Endless Possibilities of Self-Assembly. Molecules 2020; 25:E3276. [PMID: 32708440 PMCID: PMC7397133 DOI: 10.3390/molecules25143276] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 02/07/2023] Open
Abstract
Different classes of foldamers, which are synthetic oligomers that adopt well-defined conformations in solution, have been the subject of extensive studies devoted to the elucidation of the forces driving their secondary structures and their potential as bioactive molecules. Regardless of the backbone type (peptidic or abiotic), the most important features of foldamers are the high stability, easy predictability and tunability of their folding, as well as the possibility to endow them with enhanced biological functions, with respect to their natural counterparts, by the correct choice of monomers. Foldamers have also recently started playing a starring role in the self-assembly of higher-order structures. In this review, selected articles will be analyzed to show the striking number of self-assemblies obtained for foldamers with different backbones, which will be analyzed in order of increasing complexity. Starting from the simplest self-associations in solution (e.g., dimers of β-strands or helices, bundles, interpenetrating double and multiple helices), the formation of monolayers, vesicles, fibers, and eventually nanostructured solid tridimensional morphologies will be subsequently described. The experimental techniques used in the structural investigation, and in the determination of the driving forces and mechanisms underlying the self-assemblies, will be systematically reported. Where applicable, examples of biomimetic self-assembled foldamers and their interactions with biological components will be described.
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Affiliation(s)
- Samuele Rinaldi
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131 Ancona, Italy
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3
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Resa S, Reiné P, Álvarez de Cienfuegos L, Guisán-Ceinos S, Ribagorda M, Longhi G, Mazzeo G, Abbate S, Mota AJ, Miguel D, Cuerva JM. Optically active Ag(i): o-OPE helicates using a single homochiral sulfoxide as chiral inducer. Org Biomol Chem 2019; 17:8425-8434. [PMID: 31469142 DOI: 10.1039/c9ob01573f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we describe the ability of a simple enantiopure sulfoxide group to promote folding of oligo ortho-phenylene ethynylenes (o-OPEs) with one helical sense. A family of foldamers with up to seven triple bonds was synthesized and fully characterized. Moreover, changes in structure and chiroptical properties caused by Ag(i) coordination have been studied by NMR, UV, VCD and ECD measurements. Quantum mechanical DFT calculations support experimental results.
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Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Pablo Reiné
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - María Ribagorda
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Antonio J Mota
- Department of Inorganic Chemistry, UEQ, University of Granada, C.U. Fuentenueva, Granada, Spain
| | - Delia Miguel
- Department of Physical Chemistry, UEQ, University of Granada, C.U. Cartuja, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
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4
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Huan J, Zhang X, Zeng Q. Two-dimensional supramolecular crystal engineering: chirality manipulation. Phys Chem Chem Phys 2019; 21:11537-11553. [PMID: 31115407 DOI: 10.1039/c9cp02207d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two dimensional (2D) supramolecular crystal engineering, one of the most important strategies towards nanotechnology, is both a science and an industry. In the present review, the recent advances in 2D supramolecular crystal engineering through chirality manipulation on solid surfaces are summarized, with the aid of the scanning tunneling microscopy technique. On-surface chirality manipulation includes surface confined structural chirality formation, chirality transformation, chirality separation as well as chirality elimination, by using component exchange and different external stimuli. Under this principle, host-guest supramolecular interactions, solvent induction, temperature regulation and STM-tip driven orientation control and reorientation effects under equilibrium or out-of-equilibrium conditions, towards the generation of the best-adapted chiral or achiral 2D nanostructures, are mainly described and highlighted. Future challenges and opportunities in this exciting area are also then discussed.
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Affiliation(s)
- Jinwen Huan
- Business School of Hohai University, #8 West Focheng Road, Jiangning District, Nanjing, Jiangsu 210098, P. R. China
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5
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Resa S, Miguel D, Guisán-Ceinos S, Mazzeo G, Choquesillo-Lazarte D, Abbate S, Crovetto L, Cárdenas DJ, Carreño MC, Ribagorda M, Longhi G, Mota AJ, Álvarez de Cienfuegos L, Cuerva JM. Sulfoxide-Induced Homochiral Folding of ortho
-Phenylene Ethynylenes (o
-OPEs) by Silver(I) Templating: Structure and Chiroptical Properties. Chemistry 2018; 24:2653-2662. [DOI: 10.1002/chem.201704897] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | - Delia Miguel
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giuseppe Mazzeo
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos; Instituto Andaluz de Ciencias de la Tierra, CSIC-UGR; Armilla, Granada Spain
| | - Sergio Abbate
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Luis Crovetto
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - María Ribagorda
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giovanna Longhi
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Antonio J. Mota
- Department of Inorganic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
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6
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Pfeiffer CR, Pearce N, Champness NR. Complexity of two-dimensional self-assembled arrays at surfaces. Chem Commun (Camb) 2017; 53:11528-11539. [DOI: 10.1039/c7cc06110b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The developing field of complexity in self-assembled systems on surfaces is discussed.
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7
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Tobe Y, Tahara K, De Feyter S. Adaptive Building Blocks Consisting of Rigid Triangular Core and Flexible Alkoxy Chains for Self-Assembly at Liquid/Solid Interfaces. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160214] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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8
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Xu L, Miao X, Cui L, Liu P, Chen X, Deng W. Concentration-dependent structure and structural transition from chirality to nonchirality at the liquid-solid interface by coassembly. NANOSCALE 2015; 7:11734-11745. [PMID: 26103009 DOI: 10.1039/c5nr03142g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Understanding the formation and structural transition of the two-dimensional chirality of self-assembly is a subject which still gains significant interest in surface or interface chirality studies. Here, we present the solvent-induced chiral structural transition of a 2-hydroxy-7-pentadecyloxy-9-fluorenone (HPF) molecules' self-assembled adlayer through coassembly with achiral aliphatic solvents under different concentrations. Polymorphic chiral patterns are obtained at low concentrations of aliphatic solvents with different chain lengths. The HPF molecules form coassembled structures with these solvents through van der Waals interactions. At the same time, at high concentrations, HPF molecules uniformly form a nonchiral multimer structure without coadsorbed aliphatic solvent molecules. What is interesting is that these structures under different concentrations will finally change into a zigzag structure, which is the thermodynamically most stable configuration. Especially when using n-hexadecane as the solvent, the adlayer shows perfect steric matching due to the close chain length of HPF and n-hexadecane, which can maximize the molecule-solvent interactions. Thus, HPF molecules in n-hexadecane exhibit the most diversiform configuration. The distinct concentration-dependence has proven that the solvent molecules can act as a coadsorbed component through van der Waals interactions rather than simply a dispersant and further result in the probability and stability of chiral self-assembled monolayers by subtle tuning of the solvent-molecule and solvent-substrate interactions. This result provides a simple and alternative strategy to construct the 2D chiral assembled monolayer.
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Affiliation(s)
- Li Xu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
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9
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Shen X, Wei X, Tan P, Yu Y, Yang B, Gong Z, Zhang H, Lin H, Li Y, Li Q, Xie Y, Chi L. Concentration-Controlled Reversible Phase Transitions in Self-Assembled Monolayers on HOPG Surfaces. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2284-2290. [PMID: 25641852 DOI: 10.1002/smll.201402645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 10/01/2014] [Indexed: 06/04/2023]
Abstract
Rational control of molecular ordering on surfaces and interfaces is vital in supramolecular chemistry and nanoscience. Here, a systematic scanning tunneling microscopy (STM) study for controlling the self-assembly behavior of alkoxylated benzene (B-OC(n)) molecules on a HOPG surface is presented. Three different phases have been observed and, of great importance, they can transform to each other by modifying the solute concentration. Further studies, particularly in situ diluting and concentrating experiments, demonstrate that the transitions among the three phases are highly controllable and reversible, and are driven thermodynamically. In addition, it is found that concentration-controlled reversible phase transitions are general for different chain lengths of B-OC(n) molecules. Such controllable and reversible phase transitions may have potential applications in the building of desirable functional organic thin films and provide a new understanding in thermodynamically driven self-assembly of organic molecules on surfaces and interfaces.
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Affiliation(s)
- Xueli Shen
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Xiaodong Wei
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Pengli Tan
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Yingguo Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Biao Yang
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Zhongmiao Gong
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Haiming Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Haiping Lin
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Youyong Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Qing Li
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
| | - Yongshu Xie
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Lifeng Chi
- Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, P. R. China
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10
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Katoono R, Tanaka Y, Fujiwara K, Suzuki T. A Foldable Cyclic Oligomer: Chiroptical Modulation through Molecular Folding upon Complexation and a Change in Temperature. J Org Chem 2014; 79:10218-25. [PMID: 25265438 DOI: 10.1021/jo501883m] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ryo Katoono
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Yuki Tanaka
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Kenshu Fujiwara
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Takanori Suzuki
- Department of Chemistry,
Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
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11
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Polymerization or cyclic dimerization: solvent dependent homo-coupling of terminal alkynes at HOPG surface. Sci Rep 2014; 4:3899. [PMID: 24469357 PMCID: PMC3904147 DOI: 10.1038/srep03899] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 01/06/2014] [Indexed: 01/26/2023] Open
Abstract
Surface reactivity has become one of the most important issues in surface chemistry over the past few years. In this work, we, for the first time, have investigated the homo-coupling of a special terminal alkyne derivative on the highly oriented pyrolitic graphite (HOPG) surface. Using scanning tunneling microscopy (STM) technique, we have found that such coupling reaction seriously depends on the supramolecular assembly of the monomer on the studied substrate, whereas the latter appears an obvious solvent effect. As a result, the reaction in our system undergoes polymerization and cyclic dimerization process in 1-phenyloctane and 1,2,4-trichlorobenzene, respectively. That is to say, the solvent effect can be extended from the two-dimensional (2D) supramolecular self-assembly to surface chemical reactions, and the selective homo-coupling has been successfully achieved at the solid/liquid interface.
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12
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Martín-Lasanta A, Álvarez de Cienfuegos L, Johnson A, Miguel D, Mota AJ, Orte A, Ruedas-Rama MJ, Ribagorda M, Cárdenas DJ, Carmen Carreño M, Echavarren AM, Cuerva JM. Novel ortho-OPE metallofoldamers: binding-induced folding promoted by nucleating Ag(i)–alkyne interactions. Chem Sci 2014. [DOI: 10.1039/c4sc01988a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Ag(i)–alkyne interactions induce the folding of o-OPE foldamers, yielding a new class of metallofoldamers.
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Affiliation(s)
- Ana Martín-Lasanta
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | | | - Alice Johnson
- Institute of Chemical Research of Catalonia (ICIQ)
- Tarragona, Spain
| | - Delia Miguel
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | - Antonio J. Mota
- Inorganic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | - Angel Orte
- Department of Physical Chemistry
- Faculty of Pharmacy
- University of Granada
- Granada, Spain
| | | | - Maria Ribagorda
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
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13
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Zhang X, Zeng Q, Wang C. Host-guest supramolecular chemistry at solid-liquid interface: An important strategy for preparing two-dimensional functional nanostructures. Sci China Chem 2013. [DOI: 10.1007/s11426-013-4975-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Sirtl T, Song W, Eder G, Neogi S, Schmittel M, Heckl WM, Lackinger M. Solvent-dependent stabilization of metastable monolayer polymorphs at the liquid-solid interface. ACS NANO 2013; 7:6711-6718. [PMID: 23875955 DOI: 10.1021/nn4014577] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Self-assembly of 1,3,5-tris(4'-biphenyl-4"-carbonitrile)benzene monolayers was studied at the liquid-solid interface by scanning tunneling microscopy. Application of different fatty acid homologues as solvents revealed a solvent-induced polymorphism. Yet, tempering triggered irreversible phase transitions of the initially self-assembled monolayers, thereby indicating their metastability. Interestingly, in either case, the same thermodynamically more stable and more densely packed monolayer polymorph was obtained after thermal treatment, irrespective of the initial structure. Again, the same densely packed structure was obtained in complementary solvent-free experiments conducted under ultrahigh vacuum conditions. Thus, self-assembly of metastable polymorphs at room temperature is explained by adsorption of partially solvated species under kinetic control. The irreversible phase transitions are induced by thermal desolvation, that is, desorption of coadsorbed solvent molecules.
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Affiliation(s)
- Thomas Sirtl
- Department of Physics, Technische Universität München, James-Franck-Str 1, 85748 Garching, Germany
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15
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Blunt MO, Adisoejoso J, Tahara K, Katayama K, Van der Auweraer M, Tobe Y, De Feyter S. Temperature-induced structural phase transitions in a two-dimensional self-assembled network. J Am Chem Soc 2013; 135:12068-75. [PMID: 23829544 DOI: 10.1021/ja405585s] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Two-dimensional (2D) supramolecular self-assembly at liquid-solid interfaces is a thermodynamically complex process producing a variety of structures. The formation of multiple network morphologies from the same molecular building blocks is a common occurrence. We use scanning tunnelling microscopy (STM) to investigate a structural phase transition between a densely packed and a porous phase of an alkylated dehydrobenzo[12]annulene (DBA) derivative physisorbed at a solvent-graphite interface. The influence of temperature and concentration are studied and the results combined using a thermodynamic model to measure enthalpy and entropy changes associated with the transition. These experimental results are compared to corresponding values obtained from simulations and theoretical calculations. This comparison highlights the importance of considering the solvent when modeling porous self-assembled networks. The results also demonstrate the power of using structural phase transitions to study the thermodynamics of these systems and will have implications for the development of predictive models for 2D self-assembly.
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Affiliation(s)
- Matthew O Blunt
- Department of Chemistry, Division of Molecular Imaging and Photonics, Laboratory of Photochemistry and Spectroscopy, KU Leuven - University of Leuven, Celestijnenlaan 200 F B2404, B-3001 Leuven, Belgium.
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16
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Shen YT, Zhu NB, Zhang XM, Lei S, Wei Z, Li M, Zhao D, Zeng QD, Wang C. Assemblies at the liquid-solid interface: chirality expression from molecular conformers. Chemphyschem 2013; 14:92-5. [PMID: 23143888 DOI: 10.1002/cphc.201200730] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Yong-Tao Shen
- National Center for Nanoscience and Technology (NCNST), Beijing 100190, PR China
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17
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Zhang X, Xu H, Shen Y, Wang Y, Shen Z, Zeng Q, Wang C. Solvent dependent supramolecular self-assembly and surface reversal of a modified porphyrin. Phys Chem Chem Phys 2013; 15:12510-5. [DOI: 10.1039/c3cp51586a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Gobbo C, Li M, Mali KS, van Esch JH, De Feyter S. Preprogrammed 2D folding of conformationally flexible oligoamides: foldamers with multiple turn elements. ACS NANO 2012; 6:10684-10698. [PMID: 23214464 DOI: 10.1021/nn303868q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Controlling the molecular conformation of oligomers on surfaces through noncovalent interactions symbolizes an important approach in the bottom-up patterning of surfaces with nanoscale precision. Here we report on the design, synthesis, and scanning tunneling microscopy (STM) investigation of linear oligoamides adsorbed at the liquid-solid interface. A new class of extended foldamers comprising as many as four turn elements based on a structural design "rule" adapted from a mimic foldamer was successfully synthesized. The self-assembly of these progressively complex oligomeric structures was scrutinized at the liquid-solid interface by employing STM. Submolecularly resolved STM images of foldamers reveal characteristic in-plane folding and self-assembly behavior of these conformationally flexible molecules. The complexity of the supramolecular architectures increases with increasing number of turn elements. The dissimilarity in the adsorption behavior of different foldamers is discussed qualitatively in light of enthalpic and entropic factors. The modular construction of these oligomeric foldamers with integrated functionalities provides a simple, efficient, and versatile approach to surface patterning with molecular precision.
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Affiliation(s)
- Cristian Gobbo
- Department of Chemistry, Laboratory of Self-assembling Systems, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands
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