51
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Sharber SA, Baral RN, Frausto Arellano F, Haas TE, Müller P, Thomas Iii SW. Substituent Effects That Control Conjugated Oligomer Conformation through Non-covalent Interactions. J Am Chem Soc 2017; 139:5164-5174. [PMID: 28362486 DOI: 10.1021/jacs.7b00878] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although understanding the conformations and arrangements of conjugated materials as solids is key to their prospective applications, predictive power over these structural factors remains elusive. In this work, substituent effects tune non-covalent interactions between side-chain fluorinated benzyl esters and main-chain terminal arenes, in turn controlling the conformations and interchromophore aggregation of three-ring phenylene-ethynylenes (PEs). Cofacial fluoroarene-arene (ArF-ArH) interactions cause twisting in the PE backbone, interrupting intramolecular conjugation as well as blocking chromophore aggregation, both of which prevent the typically observed bathochromic shift observed upon transitioning PEs from solution to solid. This work highlights two structural factors that determine whether the ArF-ArH interactions, and the resulting twisted, unaggregated chromophores, occur in these solids: (i) the electron-releasing characteristic of substituents on ArH, with more electron-releasing character favoring ArF-ArH interactions, and (ii) the fluorination pattern of the ArF ring, with 2,3,4,5,6-pentafluorophenyl favoring ArF-ArH interactions over 2,4,6-trifluorophenyl. These trends indicate that considerations of electrostatic complementarity, whether through a polar-π or substituent-substituent mechanism, can serve as an effective design principle in controlling the interaction strengths, and therefore the optoelectronic properties, of these molecules as solids.
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Affiliation(s)
- Seth A Sharber
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | - Rom Nath Baral
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | | | - Terry E Haas
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | - Peter Müller
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Samuel W Thomas Iii
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
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52
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Roy K, Kayal S, Ariese F, Beeby A, Umapathy S. Mode specific excited state dynamics study of bis(phenylethynyl)benzene from ultrafast Raman loss spectroscopy. J Chem Phys 2017; 146:064303. [DOI: 10.1063/1.4975174] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Khokan Roy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Surajit Kayal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Freek Ariese
- On leave from LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Andrew Beeby
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, United Kingdom
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
- On leave from LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
- Department of Chemistry, University of Durham, South Road, Durham DH1 3LE, United Kingdom
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012, India
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53
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Zhu Q, Ye Z, Yang W, Cai X, Tang BZ. One-Pot Synthesis and Structure–Property Relationship of Aminomaleimides: Fluorescence Efficiencies in Monomers and Aggregates Easily Tuned by Switch of Aryl and Alkyl. J Org Chem 2017; 82:1096-1104. [PMID: 28001426 DOI: 10.1021/acs.joc.6b02706] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Qiuhua Zhu
- School
of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China
| | - Ziwei Ye
- School
of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China
| | - Weijie Yang
- School
of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China
| | - Xiaotie Cai
- School
of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China
| | - Ben Zhong Tang
- Department
of Chemistry, State Key Laboratory of Molecular Neuroscience, Institute
of Molecular Functional Materials, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon Hong Kong
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54
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Huang YQ, Zhang R, Zhao YK, Chen H, Jiang RC, Liu XF, Fan QL, Wang LH, Huang W. Self-assembled nanoparticles based on a cationic conjugated polymer/hyaluronan–cisplatin complex as a multifunctional platform for simultaneous tumor-targeting cell imaging and drug delivery. NEW J CHEM 2017. [DOI: 10.1039/c6nj04128k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A multifunctional nanoparticle system based on a cationic conjugated polymer/hyaluronan–cisplatin complex for tumor-targeting cell imaging and drug delivery.
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Affiliation(s)
- Yan-Qin Huang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Rui Zhang
- Department of Ophthalmology
- Zhongda Hospital
- Southeast University
- Nanjing 211189
- China
| | - Yong-Kang Zhao
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Hao Chen
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Rong-Cui Jiang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Xing-Fen Liu
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Qu-Li Fan
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Lian-Hui Wang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
| | - Wei Huang
- Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
- China
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55
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Chan EWC, Baek P, De la Rosa VR, Barker D, Hoogenboom R, Travas-Sejdic J. Thermoresponsive laterally-branched polythiophene phenylene derivative as water-soluble temperature sensor. Polym Chem 2017. [DOI: 10.1039/c7py00919d] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Polymers with thermoresponsive properties have received a strong interest due to their potential applications.
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Affiliation(s)
- Eddie Wai Chi Chan
- Polymer Electronics Research Centre
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
| | - Paul Baek
- Polymer Electronics Research Centre
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
| | - Victor R. De la Rosa
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - David Barker
- Polymer Electronics Research Centre
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Department of Organic and Macromolecular Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - Jadranka Travas-Sejdic
- Polymer Electronics Research Centre
- School of Chemical Sciences
- The University of Auckland
- Auckland
- New Zealand
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56
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Jagadesan P, Whittemore T, Beirl T, Turro C, McGrier PL. Excited-State Intramolecular Proton-Transfer Properties of Three Tris(N-Salicylideneaniline)-Based Chromophores with Extended Conjugation. Chemistry 2016; 23:917-925. [PMID: 27859715 DOI: 10.1002/chem.201604315] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Indexed: 01/28/2023]
Abstract
The synthesis and photophysical properties of three tris(N-salicylideneaniline) (TSA) compounds containing 1,3,5-triarylbenzene, -tristyrylbenzene, and -tris(arylethynyl)benzene core units are reported. The TSA compounds underwent efficient excited-state intramolecular proton transfer (ESIPT) in solution and in solid state due to the preformed C=N⋅⋅⋅H-O hydrogen-bonded motifs of the structures. Steady-state fluorescence emission spectra of the TSA molecules revealed dual bands only in DMSO, and large Stokes shifts in other polar aprotic and protic solvents. Femtosecond transient absorption spectroscopic measurements in THF revealed lifetime values in the range of 14-16 ps for the excited-state keto-tautomer. The TSA compounds are also responsive to metal ions (Cu2+ and Zn2+ ) in DMSO, exhibit enhanced aggregate-induced emission (AIE) properties in DMSO/water mixtures, and are highly luminescent in the solid state.
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Affiliation(s)
- Pradeepkumar Jagadesan
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio, 43210, USA
| | - Tyler Whittemore
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio, 43210, USA
| | - Toni Beirl
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio, 43210, USA
| | - Claudia Turro
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio, 43210, USA
| | - Psaras L McGrier
- Department of Chemistry & Biochemistry, The Ohio State University, 100 W 18th Ave., Columbus, Ohio, 43210, USA
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57
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Zhu C, Mu AU, Lin YH, Guo ZH, Yuan T, Wheeler SE, Fang L. Molecular Coplanarity and Self-Assembly Promoted by Intramolecular Hydrogen Bonds. Org Lett 2016; 18:6332-6335. [PMID: 27978664 DOI: 10.1021/acs.orglett.6b03225] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Active conformational control is realized in a conjugated system using intramolecular hydrogen bonds to achieve tailored molecular, supramolecular, and solid-state properties. The hydrogen bonding functionalities are fused to the backbone and precisely preorganized to enforce a fully coplanar conformation of the π-system, leading to short π-π stacking distances, controllable molecular self-assembly, and solid-state growth of one-dimensional nano-/microfibers. This investigation demonstrates the efficiency and significance of an intramolecular noncovalent approach in promoting conformational control and self-assembly of organic molecules.
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Affiliation(s)
- Congzhi Zhu
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Anthony U Mu
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Yen-Hao Lin
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Zi-Hao Guo
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Tianyu Yuan
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Steven E Wheeler
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
| | - Lei Fang
- Department of Chemistry, Texas A&M University , 3255 TAMU, College Station, Texas 77843, United States
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58
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Thelu HVP, Albert SK, Golla M, Krishnan N, Yamijala SB, Nair SV, Srinivasula SM, Varghese R. DNA-Decorated Luminescent Vesicles as Drug Carriers. ChemistrySelect 2016. [DOI: 10.1002/slct.201600897] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hari Veera Prasad Thelu
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Shine K. Albert
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Murali Golla
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | - Nithiyanandan Krishnan
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
| | | | | | | | - Reji Varghese
- School of Chemistry; Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM); CET campus Trivandrum- 695016 India
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59
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Huang YQ, Zhong YY, Zhang R, Zhao YK, Liu XF, Zhang GW, Fan QL, Wang LH, Huang W. Tuning the backbones and side chains of cationic meta-linked poly(phenylene ethynylene)s: Different conformational modes, tunable light emission, and helical wrapping of multi-walled carbon nanotubes. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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60
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Kale TS, Tovar JD. Regulation of peptide-π-peptide nanostructure bundling: the impact of ‘cruciform’ π-electron segments. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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61
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Yim KC, Au VKM, Hung LL, Wong KMC, Yam VWW. Luminescent Dinuclear Bis-Cyclometalated Gold(III) Alkynyls and Their Solvent-Dependent Morphologies through Supramolecular Self-Assembly. Chemistry 2016; 22:16258-16270. [DOI: 10.1002/chem.201603186] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Indexed: 01/09/2023]
Affiliation(s)
- King-Chin Yim
- Institute of Molecular Functional Materials; Areas of Excellence Scheme; University Grants Committee (Hong Kong) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Vonika Ka-Man Au
- Institute of Molecular Functional Materials; Areas of Excellence Scheme; University Grants Committee (Hong Kong) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Ling-Ling Hung
- Institute of Molecular Functional Materials; Areas of Excellence Scheme; University Grants Committee (Hong Kong) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Keith Man-Chung Wong
- Department of Chemistry; South University of Science and Technology of China; Shenzhen, Guangdong 518055 P. R. China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials; Areas of Excellence Scheme; University Grants Committee (Hong Kong) and; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
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62
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Zheng X, Peng Q, Zhu L, Xie Y, Huang X, Shuai Z. Unraveling the aggregation effect on amorphous phase AIE luminogens: a computational study. NANOSCALE 2016; 8:15173-15180. [PMID: 27417250 DOI: 10.1039/c6nr03599j] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To achieve the efficient and precise regulation of aggregation-induced emission (AIE), unraveling the aggregation effects on amorphous AIE luminogens is of vital importance. Using a theoretical protocol combining molecular dynamics simulations and quantum mechanics/molecular mechanics calculations, we explored the relationship between molecular packing, optical spectra and fluorescence quantum efficiency of amorphous AIE luminogens hexaphenylsilole (HPS). We confirmed that the redshifted emission of amorphous aggregates as compared to crystalline HPS is caused by the lower packing density of amorphous HPS aggregates and the reduced restrictions on their intramolecular low-frequency vibrational motions. Strikingly, our calculations revealed the size independent fluorescence quantum efficiency of nanosized HPS aggregates and predicted the linear relationship between the fluorescence intensity and aggregate size. This is because the nanosized aggregates are dominated by embedded HPS molecules which exhibit similar fluorescence quantum efficiency at different aggregate sizes. In addition, our results provided a direct explanation for the crystallization-enhanced emission phenomenon of propeller-shaped AIE luminogens in experiments. Our theoretical protocol is general and applicable to other AIE luminogens, thus laying solid foundation for the rational design of advanced AIE materials.
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Affiliation(s)
- Xiaoyan Zheng
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
| | - Qian Peng
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Lizhe Zhu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
| | - Yujun Xie
- Department of Chemistry, Wuhan University, Wuhan 430072, P.R. China
| | - Xuhui Huang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Zhigang Shuai
- Key Laboratory of Organic OptoElectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
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63
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Doan H, Raut SL, Yale D, Balaz M, Dzyuba SV, Gryczynski Z. Mechanothermally induced conformational switch of a porphyrin dimer in a polymer film. Chem Commun (Camb) 2016; 52:9510-3. [PMID: 27294828 PMCID: PMC6167131 DOI: 10.1039/c6cc04306b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stretching a polymer film induces a conformational change (from the twisted to planar state) in the embedded porphyrin dimer, as evidenced by steady-state and time-resolved emission spectra.
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Affiliation(s)
- Hung Doan
- Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129, USA.
| | - Sangram L Raut
- Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129, USA.
| | - David Yale
- Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129, USA.
| | - Milan Balaz
- Underwood International College, Integrated Science & Engineering Division, Yonsei University, Seoul, 03722, Republic of Korea.
| | - Sergei V Dzyuba
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, TX 76129, USA.
| | - Zygmunt Gryczynski
- Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129, USA.
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64
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Szyszkowska M, Bylińska I, Wiczk W. Influence of an electron-acceptor substituent type on the photophysical properties of unsymmetrically substituted diphenylacetylene. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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65
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Roué S, Sahnoune H, Toupet L, Halet JF, Lapinte C. Double Insertion of Thiophene Rings in Polyynediyl Chains to Stabilize Nanoscaled Molecular Wires with [Cp*(dppe)Fe] Termini. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00209] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Séverine Roué
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Hiba Sahnoune
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
- Département
de Chimie, Faculté des Sciences, Université M’Hamed Bougara, Boumerdès, Algeria
| | - Loïc Toupet
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Jean-François Halet
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
| | - Claude Lapinte
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042 Rennes, France
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66
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Thomas SW, Pawle RH, Smith ZC. Stimuli-responsive side chains for new function from conjugated materials. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.02.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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67
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Moral M, García G, Garzón A, Granadino-Roldán JM, Fernández-Gómez M. DFT study of the effect of fluorine atoms on the crystal structure and semiconducting properties of poly(arylene-ethynylene) derivatives. J Chem Phys 2016; 144:154902. [DOI: 10.1063/1.4945447] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Mónica Moral
- Renewable Energy Research Institute, University of Castilla-La Mancha, Paseo de la Investigación 1, 02071 Albacete, Spain
| | - Gregorio García
- Department of Chemistry, University of Burgos, Plaza Misael Bañuelos, s/n, 09001 Burgos, Spain
| | - Andrés Garzón
- Department of Physical Chemistry, Faculty of Pharmacy, University of Castilla-La Mancha, Paseo de los Estudiantes, 02071 Albacete, Spain
| | - José M. Granadino-Roldán
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Campus Las Lagunillas, s/n, 23071 Jaén, Spain
| | - Manuel Fernández-Gómez
- Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences, University of Jaén, Campus Las Lagunillas, s/n, 23071 Jaén, Spain
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68
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Ibrahim MB, Ali BE, Malik I, Fettouhi M. Synthesis of functionalized alkynes via palladium-catalyzed Sonogashira reactions. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.086] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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69
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Das M, Baig F, Sarkar M. Photophysical properties of di-Schiff bases: evaluating the synergistic effect of non-covalent interactions and alkyl spacers in enhanced emissions of solids. RSC Adv 2016. [DOI: 10.1039/c6ra08582b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Di-Schiff bases with alkyl spacer (ethyl, butyl and hexyl) showed enhanced light emitting properties in solid state, while quenching was observed for di-Schiff bases with hydrazine spacer. Packing of the molecules via non covalent interactions along with the flexible spacer played the role in dictating the emission properties.
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Affiliation(s)
- Moyna Das
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- India
| | - Fayaz Baig
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- India
| | - Madhushree Sarkar
- Department of Chemistry
- Birla Institute of Technology and Science Pilani
- India
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70
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Joshi R, Meitei OR, Jadhao M, Kumar H, Ghosh SK. Conformation controlled turn on–turn off phosphorescence in a metal-free biluminophore: thriving the paradox that exists for organic compounds. Phys Chem Chem Phys 2016; 18:27910-27920. [DOI: 10.1039/c6cp04336d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dual state intense emission, both fluorescence and phosphorescence, of CBIQD by way of conformational regulation–deregulation.
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Affiliation(s)
- Ritika Joshi
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
| | - Oinam Romesh Meitei
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
| | - Manojkumar Jadhao
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
| | - Himank Kumar
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
| | - Sujit Kumar Ghosh
- Department of Chemistry
- Visvesvaraya National Institute of Technology
- Nagpur
- India
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71
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Coelho JP, Tardajos G, Stepanenko V, Rödle A, Fernández G, Guerrero-Martínez A. Cooperative Self-Assembly Transfer from Hierarchical Supramolecular Polymers to Gold Nanoparticles. ACS NANO 2015; 9:11241-11248. [PMID: 26493583 DOI: 10.1021/acsnano.5b04841] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The transfer of information encoded by molecular subcomponents is a key phenomenon that regulates the biological inheritance in living organisms, yet there is a lack of understanding of related transfer mechanisms at the supramolecular level in artificial multicomponent systems. Our contribution to tackle this challenge has focused on the design of a thiolated π-conjugated linking unit, whose hierarchical, cooperative self-assembly in nonpolar media can be efficiently transferred from the molecular to the nanoscopic level, thereby enabling the reversible self-assembly of gold nanoparticle (AuNP) clusters. The transfer of supramolecular information by the linking π-system can only take place when a specific cooperative nucleation-elongation mechanism is operative, whereas low-ordered noncooperative assemblies formed below a critical concentration do not suffice to extend the order to the AuNP level. To the best of our knowledge, our approach has allowed for the first time a deep analysis of the hierarchy levels and thermodynamics involved in the self-assembly of AuNPs.
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Affiliation(s)
- João Paulo Coelho
- Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid , Avda. Complutense s/n, 28040, Madrid, Spain
| | - Gloria Tardajos
- Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid , Avda. Complutense s/n, 28040, Madrid, Spain
| | - Vladimir Stepanenko
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Alexander Rödle
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Gustavo Fernández
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Andrés Guerrero-Martínez
- Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid , Avda. Complutense s/n, 28040, Madrid, Spain
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72
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Eom I, Lim SJ, Park SY, Joo T. Photoluminescence Characteristics of p-Phenylene Vinylene and Its Derivatives in Solution and in Nanoaggregates. ACTA ACUST UNITED AC 2015. [DOI: 10.5857/rcp.2015.4.3.70] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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73
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Harris JD, Liu J, Carter KR. Synthesis of π-Bridged Dually-Dopable Conjugated Polymers from Benzimidazole and Fluorene: Separating Sterics from Electronics. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01174] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jared D. Harris
- Department of Polymer Science
and Engineering, University of Massachusetts − Amherst, Conte Center for Polymer Research, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Jiakai Liu
- Department of Polymer Science
and Engineering, University of Massachusetts − Amherst, Conte Center for Polymer Research, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Kenneth R. Carter
- Department of Polymer Science
and Engineering, University of Massachusetts − Amherst, Conte Center for Polymer Research, 120 Governors Drive, Amherst, Massachusetts 01003, United States
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74
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Shi Y, Frattarelli D, Watanabe N, Facchetti A, Cariati E, Righetto S, Tordin E, Zuccaccia C, Macchioni A, Wegener SL, Stern CL, Ratner MA, Marks TJ. Ultra-High-Response, Multiply Twisted Electro-optic Chromophores: Influence of π-System Elongation and Interplanar Torsion on Hyperpolarizability. J Am Chem Soc 2015; 137:12521-38. [DOI: 10.1021/jacs.5b04636] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanrong Shi
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - David Frattarelli
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Naoki Watanabe
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Antonio Facchetti
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Elena Cariati
- Dipartimento
di Chimica dell’Università di Milano and Unità di Ricerca dell’INSTM
di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Stefania Righetto
- Dipartimento
di Chimica dell’Università di Milano and Unità di Ricerca dell’INSTM
di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Elisa Tordin
- Dipartimento
di Chimica dell’Università di Milano and Unità di Ricerca dell’INSTM
di Milano, Via Golgi 19, I-20133 Milano, Italy
| | - Cristiano Zuccaccia
- Dipartimento
di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia, Via Elce di Sotto, I-06123 Perugia, Italy
| | - Alceo Macchioni
- Dipartimento
di Chimica, Biologia e Biotecnologie and CIRCC, Università degli Studi di Perugia, Via Elce di Sotto, I-06123 Perugia, Italy
| | - Staci L. Wegener
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Charlotte L. Stern
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Mark A. Ratner
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Tobin J. Marks
- Department
of Chemistry and the Materials Research Center, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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75
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Bai W, Wu C, Shang X, Cai L, Lin J. Precipitation and sol formation from poly(p-phenylene)s solutions by spectroscopic study. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.07.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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76
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Zhu Q, Zhang Y, Nie H, Zhao Z, Liu S, Wong KS, Tang BZ. Insight into the strong aggregation-induced emission of low-conjugated racemic C6-unsubstituted tetrahydropyrimidines through crystal-structure-property relationship of polymorphs. Chem Sci 2015; 6:4690-4697. [PMID: 29142708 PMCID: PMC5667501 DOI: 10.1039/c5sc01226k] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 05/26/2015] [Indexed: 01/12/2023] Open
Abstract
Racemic C6-unsubstituted tetrahydropyrimidines (THPs) are a series of fluorophores with a strong aggregation-induced emission (AIE) effect. However, they do not possess the structural features of conventional AIE compounds. In order to understand their AIE mechanism, here, the influences of the molecular packing mode and the conformation on the optical properties of THPs were investigated using seven crystalline polymorphs of three THPs (1-3). The racemic THPs 1-3 have low-conjugated and highly flexible molecular structures, and hence show practically no emission in different organic solvents. However, the fluorescence quantum yields of their polymorphs are up to 93%, and the maximum excitation (λex) and emission (λem) wavelengths of the polymorphs are long at 409 and 484 nm, respectively. Single-crystal structures and theoretical calculation of the HOMOs and LUMOs based on the molecular conformations of these polymorphs indicate that the polymorphs with the shortest λex and λem values possess a RS-packing mode (R- and S-enantiomers self-assemble as paired anti-parallel lines) and a more twisted conformation without through-space conjugation between the dicarboxylates, but the polymorphs with longer λex and λem values adopt a RR/SS-packing mode (R- and S-enantiomers self-assemble as unpaired zigzag lines) and a less twisted conformation with through-space conjugation between the dicarboxylates. The molecular conformations of 1-3 in all these polymorphs are stereo and more twisted than those in solution. Although 1-3 are poorly conjugated, the radiative rate constants (kr) of their polymorphs are as large as conventional fluorophores (0.41-1.03 × 108 s-1) because of improved electronic conjugation by both through-bond and through-space interactions. Based on the obtained results, it can be deduced that the strong AIE arises not only from the restriction of intramolecular motion but also from enhanced electronic coupling and radiatively-favored inter-crossed local excitation (LE) and intramolecular charge transfer (ICT) excitation states. The abnormal molecular structures, easily-controllable self-assembly of the R- and S-enantiomers, and the strong AIE effect make THPs very useful fluorophores for applications and theoretical research.
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Affiliation(s)
- Qiuhua Zhu
- School of Pharmaceutical Sciences , Southern Medical University , 1838 Guangzhou Avenue North , Guangzhou 510515 , China .
| | - Yilin Zhang
- Department of Physics , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong .
| | - Han Nie
- Guangdong Innovative Research Team , State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , China
| | - Zujin Zhao
- Guangdong Innovative Research Team , State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , China
| | - Shuwen Liu
- School of Pharmaceutical Sciences , Southern Medical University , 1838 Guangzhou Avenue North , Guangzhou 510515 , China .
| | - Kam Sing Wong
- Department of Physics , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong .
| | - Ben Zhong Tang
- Guangdong Innovative Research Team , State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , China
- Department of Chemistry , State Key Laboratory of Molecular Neuroscience , Institute of Molecular Functional Materials , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong , China .
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77
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Stangl T, Wilhelm P, Schmitz D, Remmerssen K, Henzel S, Jester SS, Höger S, Vogelsang J, Lupton JM. Temporal Fluctuations in Excimer-Like Interactions between π-Conjugated Chromophores. J Phys Chem Lett 2015; 6:1321-1326. [PMID: 26263130 DOI: 10.1021/acs.jpclett.5b00328] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Inter- or intramolecular coupling processes between chromophores such as excimer formation or H- and J-aggregation are crucial to describing the photophysics of closely packed films of conjugated polymers. Such coupling is highly distance dependent and should be sensitive to both fluctuations in the spacing between chromophores as well as the actual position on the chromophore where the exciton localizes. Single-molecule spectroscopy reveals these intrinsic fluctuations in well-defined bichromophoric model systems of cofacial oligomers. Signatures of interchromophoric interactions in the excited state--spectral red shifting and broadening and a slowing of photoluminescence decay--correlate with each other but scatter strongly between single molecules, implying an extraordinary distribution in coupling strengths. Furthermore, these excimer-like spectral fingerprints vary with time, revealing intrinsic dynamics in the coupling strength within one single dimer molecule, which constitutes the starting point for describing a molecular solid. Such spectral sensitivity to sub-Ångström molecular dynamics could prove complementary to conventional FRET-based molecular rulers.
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Affiliation(s)
- Thomas Stangl
- †Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Philipp Wilhelm
- †Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Daniela Schmitz
- ‡Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Klaas Remmerssen
- ‡Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Sebastian Henzel
- ‡Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Stefan-S Jester
- ‡Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Sigurd Höger
- ‡Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Jan Vogelsang
- †Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - John M Lupton
- †Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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78
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Son HJ, Kim CH, Kim DW, Jeong NC, Prasittichai C, Luo L, Wu J, Farha OK, Wasielewski MR, Hupp JT. Post-assembly atomic layer deposition of ultrathin metal-oxide coatings enhances the performance of an organic dye-sensitized solar cell by suppressing dye aggregation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:5150-5159. [PMID: 25695408 DOI: 10.1021/am507405b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dye aggregation and concomitant reduction of dye excited-state lifetimes and electron-injection yields constitute a significant mechanism for diminution of light-to-electrical energy conversion efficiencies in many dye-sensitized solar cells (DSCs). For TiO2-based DSCs prepared with an archetypal donor-acceptor organic dye, (E)-2-cyano-3-(5'-(5''-(p-(diphenylamino)phenyl)-thiophen-2''-yl)thiophen-2'-yl)acrylic acid (OrgD), we find, in part via ultrafast spectroscopy measurements, that postdye-adsorption atomic layer deposition (ALD) of ultrathin layers of either TiO2 or Al2O3 effectively reverses residual aggregation. Notably, the ALD treatment is significantly more effective than the widely used aggregation-inhibiting coadsorbent, chenodeoxycholic acid. Primarily because of reversal of OrgD aggregation, and resulting improved injection yields, ALD post-treatment engenders a 30+% increase in overall energy conversion efficiency. A secondary contributor to increased currents and efficiencies is an ALD-induced attenuation of the rate of interception of injected electrons, resulting in slightly more efficient charge collection.
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Affiliation(s)
- Ho-Jin Son
- Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States
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79
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NAG OKHILK, ANIS-UL-HAQUE KAZIM, DEBNATH DIPEN, BEGUM ROCKSHANA, YOUNUS MUHAMMAD, CHAWDHURY NAZIA, KOCIOK-KÖHN GABRIELE, RAITHBY PAULR. Synthesis and optical properties of biphenylene ethynylene co-polymers and their model compounds. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0789-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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80
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Hierarchical multicolor nano-pixel matrices formed by coordinating luminescent metal ions to a conjugated poly(4'-octyl-2',6'-bispyrazoyl pyridine) film via contact printing. Sci Rep 2015; 5:8406. [PMID: 25673007 PMCID: PMC4325338 DOI: 10.1038/srep08406] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 01/16/2015] [Indexed: 11/09/2022] Open
Abstract
We introduce a cost-effective, yet feasible reactive printing approach namely, “coordination chemistry at the conjugated ligand polymer surface”. By using a contact printing technique we selectively fabricated high resolution nano-pixel configurations consisting of red, blue and green (R,G,B) colors arranged in a hierarchical three-dimensional fashion. For this, we have synthesized a novel blue emitting conjugated ligand polymer, [poly(4′-octyl-2′,6′-bispyrazoyl pyridine)] ( ~ 7–8 KDa) having a tridentate ligand in its repeating unit which forms a thin film prone of binding metal ions. On top of this ligand polymer film, a layer of high-resolution cross-stripes (width ca. 800 nm) was printed comprised of Eu and Tb ions over a large area ~ 100 × 100 μm2. The final woodpile-like assembly produced a new pixel group consisting of B; BG; BR; and BGR (White) colors. The area of the white emitting square is ca. 0.64 μm2. The patterned layers that make up the pixels are very thin and thus this new technique might find applications in flexible light emitting devices.
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81
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Synthesis and photophysical properties of poly(arylene ethynylene) small-molecules and polymers derivatized with leucine substituents. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2014.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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82
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Baig F, Kant R, Gupta VK, Sarkar M. Effects of non covalent interactions in light emitting properties of bis-pyridyl-alkyl-di-imines. RSC Adv 2015. [DOI: 10.1039/c5ra09562j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Crystallization induced emission is observed for bis-pyridyl-ethyl-di-imine and bis-pyridyl-butyl-di-imine. While in case of bis-pyridyl-di-imines, with no alkyl spacer, the quenching is observed in the solid state.
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Affiliation(s)
- Fayaz Baig
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani Campus
- Pilani
- India
| | - Rajni Kant
- Post Graduate Department of Physics
- University of Jammu
- Jammu Tawi
- India
| | - Vivek K. Gupta
- Post Graduate Department of Physics
- University of Jammu
- Jammu Tawi
- India
| | - Madhushree Sarkar
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani Campus
- Pilani
- India
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83
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Wierzbicka M, Bylińska I, Czaplewski C, Wiczk W. Experimental and theoretical studies of the spectroscopic properties of simple symmetrically substituted diphenylacetylene derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra01077b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
A series of symmetrically substituted diphenylacetylene derivatives possessing electron-donating or electron-accepting character were prepared and studied with respect to their spectral and photophysical properties.
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84
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Lin CJ, Kundu SK, Lin CK, Yang JS. Conformational Control of Oligo(p-phenyleneethynylene)s with Intrinsic Substituent Electronic Effects: Origin of the Twist in Pentiptycene-Containing Systems. Chemistry 2014; 20:14826-33. [DOI: 10.1002/chem.201403795] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Indexed: 11/09/2022]
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85
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Allampally NK, Florian A, Mayoral MJ, Rest C, Stepanenko V, Fernández G. H-Aggregates of Oligophenyleneethynylene (OPE)-BODIPY Systems in Water: Guest Size-Dependent Encapsulation Mechanism and Co-aggregate Morphology. Chemistry 2014; 20:10669-78. [DOI: 10.1002/chem.201402077] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Indexed: 01/06/2023]
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86
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Menning S, Krämer M, Duckworth A, Rominger F, Beeby A, Dreuw A, Bunz UHF. Bridged tolanes: a twisted tale. J Org Chem 2014; 79:6571-8. [PMID: 24937689 DOI: 10.1021/jo5010235] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rotational motion of tolanes along their acetylene axis is not fully understood. What happens to the optical and electronic properties if the tolane backbone is forced into a twisted conformation? Several tethers were investigated to obtain tolanophanes, fixing the torsion angle of the two phenyl rings. X-ray crystal structures revealed tether-specific torsion angles in the solid state. The absorption, emission, and excitation spectra were recorded. Twisted tethered tolane conformers showed blue-shifted absorption; emission spectra were all torsionally independent and identical. The tethered tolanes were embedded in a rigid matrix by freezing to 77 K; well-resolved emission spectra were recorded for planar tolanes, but for twisted systems unexpectedly long-lived phosphorescence was observed. How is this triplet emission explained? Quantum chemical calculations (TDDFT/cam-B3LYP/6-31G*) of the unsubstituted tolane showed that intersystem crossing (ISC) is favored with large spin-orbit coupling, which occurs when the molecular orbitals are orthogonal to each other; this is the case at the crossing of S1/T7. Also, a small energy difference between singlet and triplet states is required; we found that ISC can favorably take place at four crossings: S1/T6, S1/T7, S1/T(8,9), S1/T10.
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Affiliation(s)
- Sebastian Menning
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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87
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Albert SK, Thelu HVP, Golla M, Krishnan N, Chaudhary S, Varghese R. Self-assembly of DNA-oligo(p-phenylene-ethynylene) hybrid amphiphiles into surface-engineered vesicles with enhanced emission. Angew Chem Int Ed Engl 2014; 53:8352-7. [PMID: 24962762 DOI: 10.1002/anie.201403455] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/19/2014] [Indexed: 11/09/2022]
Abstract
Surface-addressable nanostructures of linearly π-conjugated molecules play a crucial role in the emerging field of nanoelectronics. Herein, by using DNA as the hydrophilic segment, we demonstrate a solid-phase "click" chemistry approach for the synthesis of a series of DNA-chromophore hybrid amphiphiles and report their reversible self-assembly into surface-engineered vesicles with enhanced emission. DNA-directed surface addressability of the vesicles was demonstrated through the integration of gold nanoparticles onto the surface of the vesicles by sequence-specific DNA hybridization. This system could be converted to a supramolecular light-harvesting antenna by integrating suitable FRET acceptors onto the surface of the nanostructures. The general nature of the synthesis, surface addressability, and biocompatibility of the resulting nanostructures offer great promises for nanoelectronics, energy, and biomedical applications.
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Affiliation(s)
- Shine K Albert
- School of Chemistry, Indian Institute of Science Education and Research-Thiruvananthapuram (IISER-TVM), CET campus, Trivandrum-695016 (India)
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88
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Albert SK, Thelu HVP, Golla M, Krishnan N, Chaudhary S, Varghese R. Self-Assembly of DNA-Oligo(p-phenylene-ethynylene) Hybrid Amphiphiles into Surface-Engineered Vesicles with Enhanced Emission. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403455] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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89
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Simalou O, Lu R, Xue P, Gong P, Zhang T. C3-Symmetrical Cyano-Substituted Triphenylbenzenes for Organogels and Organic Nanoparticles with Controllable Fluorescence and Aggregation-Induced Emission. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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90
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Kahveci Z, Martínez-Tomé MJ, Esquembre R, Mallavia R, Mateo CR. Selective Interaction of a Cationic Polyfluorene with Model Lipid Membranes: Anionic versus Zwitterionic Lipids. MATERIALS 2014; 7:2120-2140. [PMID: 28788559 PMCID: PMC5453277 DOI: 10.3390/ma7032120] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 02/19/2014] [Accepted: 03/04/2014] [Indexed: 12/20/2022]
Abstract
This paper explores the interaction mechanism between the conjugated polyelectrolyte {[9,9-bis(6'-N,N,N-trimethylammonium)hexyl]fluorene-phenylene}bromide (HTMA-PFP) and model lipid membranes. The study was carried out using different biophysical techniques, mainly fluorescence spectroscopy and microscopy. Results show that despite the preferential interaction of HTMA-PFP with anionic lipids, HTMA-PFP shows affinity for zwitterionic lipids; although the interaction mechanism is different as well as HTMA-PFP's final membrane location. Whilst the polyelectrolyte is embedded within the lipid bilayer in the anionic membrane, it remains close to the surface, forming aggregates that are sensitive to the physical state of the lipid bilayer in the zwitterionic system. The different interaction mechanism is reflected in the polyelectrolyte fluorescence spectrum, since the maximum shifts to longer wavelengths in the zwitterionic system. The intrinsic fluorescence of HTMA-PFP was used to visualize the interaction between polymer and vesicles via fluorescence microscopy, thanks to its high quantum yield and photostability. This technique allows the selectivity of the polyelectrolyte and higher affinity for anionic membranes to be observed. The results confirmed the appropriateness of using HTMA-PFP as a membrane fluorescent marker and suggest that, given its different behaviour towards anionic and zwitterionic membranes, HTMA-PFP could be used for selective recognition and imaging of bacteria over mammalian cells.
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Affiliation(s)
- Zehra Kahveci
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (Alicante) 03202, Spain.
| | - María José Martínez-Tomé
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (Alicante) 03202, Spain.
| | - Rocío Esquembre
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (Alicante) 03202, Spain.
| | - Ricardo Mallavia
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (Alicante) 03202, Spain.
| | - C Reyes Mateo
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (Alicante) 03202, Spain.
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92
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O’Hanlon DC, Cohen BW, Moravec DB, Dallinger RF, Hopkins MD. Electronic, Redox, and Photophysical Consequences of Metal-for-Carbon Substitution in Oligo-Phenylene-Ethynylenes. J Am Chem Soc 2014; 136:3127-36. [DOI: 10.1021/ja411354d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Daniel C. O’Hanlon
- Department
of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Brian W. Cohen
- Department
of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Davis B. Moravec
- Department
of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Richard F. Dallinger
- Department
of Chemistry, Wabash College, Crawfordsville, Indiana 47933, United States
| | - Michael D. Hopkins
- Department
of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
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93
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Lin CJ, Chen CY, Kundu SK, Yang JS. Unichromophoric Platinum-Acetylides That Contain Pentiptycene Scaffolds: Torsion-Induced Dual Emission and Steric Shielding of Dynamic Quenching. Inorg Chem 2014; 53:737-45. [DOI: 10.1021/ic4025052] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Che-Jen Lin
- Department
of Chemistry, National Taiwan University, No 1, Sec 4, Roosevelt Rd, Taipei 10617, Taiwan
| | - Chih-Yuan Chen
- Department
of Chemistry, National Taiwan University, No 1, Sec 4, Roosevelt Rd, Taipei 10617, Taiwan
| | - Sandip Kumar Kundu
- Department
of Chemistry, National Taiwan University, No 1, Sec 4, Roosevelt Rd, Taipei 10617, Taiwan
| | - Jye-Shane Yang
- Department
of Chemistry, National Taiwan University, No 1, Sec 4, Roosevelt Rd, Taipei 10617, Taiwan
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94
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Pawle RH, Haas TE, Müller P, Thomas III SW. Twisting and piezochromism of phenylene-ethynylenes with aromatic interactions between side chains and main chains. Chem Sci 2014. [DOI: 10.1039/c4sc01466a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper describes a series of three-ring phenylene-ethynylenes (PEs) in which specific, non-covalent arene–arene interactions control conformation in the solid-state.
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Affiliation(s)
- R. H. Pawle
- Department of Chemistry
- Tufts University
- Medford, USA
| | - T. E. Haas
- Department of Chemistry
- Tufts University
- Medford, USA
| | - P. Müller
- Department of Chemistry
- Massachusetts Institute of Technology
- Cambridge, USA
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95
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Lin N, Toh GW, Feng Y, Liu XY, Xu H. Two-photon fluorescent Bombyx mori silk by molecular recognition functionalization. J Mater Chem B 2014; 2:2136-2143. [DOI: 10.1039/c3tb21602k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Two-photon fluorescent (TPF) Bombyx mori silk fibers were acquired for bioimaging by molecular recognition functionalization.
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Affiliation(s)
- Naibo Lin
- College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai, China
- Research Institute for Biomimetics and Soft Matter & College of Materials
- Xiamen University
| | - Guoyang William Toh
- MIT-Singapore Alliance
- Department of Physics
- National University of Singapore
- Singapore, Singapore
| | - Yan Feng
- College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai, China
| | - X. Y. Liu
- College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai, China
- Research Institute for Biomimetics and Soft Matter & College of Materials
- Xiamen University
| | - Hongyao Xu
- College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Donghua University
- Shanghai, China
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96
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Li N, Li Z, Zhang X, Hua R. Synthesis of 1,4-bis(phenylethynyl)benzenes and their application as blue phase liquid crystal composition. Int J Mol Sci 2013; 14:23257-73. [PMID: 24287903 PMCID: PMC3876042 DOI: 10.3390/ijms141223257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2013] [Revised: 10/16/2013] [Accepted: 11/11/2013] [Indexed: 11/16/2022] Open
Abstract
A number of 1,4-bis(phenylethynyl)benzene derivatives (BPEBs) and their analogues with different numbers of side-substitute fluorine atoms on benzene rings, and alkyl chains, ethoxyl groups, fluorine atoms and trifluoromethyl groups as the end groups have been synthesized. The effects of the different substituents on their properties such as thermal behavior of melting point and clearing point, the temperature of nematic phase, optical anisotropy and dielectric anisotropy have been well investigated, and it has been found that some BPEBs have a wide range of the nematic phase temperature with high optical anisotropy (Δn) and acceptable dielectric anisotropy (Δε), which have been applied as the crucial compositions to constitute a liquid crystal mixture having the properties of Δε=29.0 and Δn=0.283 at 25 °C. With the addition of the chiral dopant to the obtained liquid crystal mixture, blue phase liquid crystal with a blue phase temperature range of 8 °C has been achieved.
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Affiliation(s)
- Ning Li
- Beijing R&D Center, Shijiazhuang Chengzhi Yonghua Display Materials Co. Ltd., Beijing 100083, China; E-Mails: (N.L.); (Z.L.); (X.Z.)
- Hebei Engineering & Technology Center for FPD Materials, Shijiazhuang 050091, China
| | - Zhengqiang Li
- Beijing R&D Center, Shijiazhuang Chengzhi Yonghua Display Materials Co. Ltd., Beijing 100083, China; E-Mails: (N.L.); (Z.L.); (X.Z.)
- Hebei Engineering & Technology Center for FPD Materials, Shijiazhuang 050091, China
| | - Xing Zhang
- Beijing R&D Center, Shijiazhuang Chengzhi Yonghua Display Materials Co. Ltd., Beijing 100083, China; E-Mails: (N.L.); (Z.L.); (X.Z.)
- Hebei Engineering & Technology Center for FPD Materials, Shijiazhuang 050091, China
| | - Ruimao Hua
- Department of Chemistry, Tsinghua University, Beijing 100084, China
- Beijing R&D Center, Shijiazhuang Chengzhi Yonghua Display Materials Co. Ltd., Beijing 100083, China; E-Mails: (N.L.); (Z.L.); (X.Z.)
- Hebei Engineering & Technology Center for FPD Materials, Shijiazhuang 050091, China
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97
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Yatabe T, Okumoto H, Kawanishi Y, Inoue T. Charge-carrier Transport in 1,4-Bis(phenylethynyl)benzene Derivatives Exhibiting Crystal Mesophases. CHEM LETT 2013. [DOI: 10.1246/cl.130219] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tetsuo Yatabe
- National Institute of Advanced Industrial Science and Technology (AIST)
| | - Hajime Okumoto
- National Institute of Advanced Industrial Science and Technology (AIST)
| | - Yuji Kawanishi
- National Institute of Advanced Industrial Science and Technology (AIST)
| | - Takahito Inoue
- National Institute of Advanced Industrial Science and Technology (AIST)
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98
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Khoshkhoo MS, Taromi FA, Kowsari E, Shalamzari EK. Contribution of chromophores with different numbers of repeat units to overall emission of MEH–PPV: An experimental and simulation study. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.05.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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99
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Kahveci Z, Martínez-Tomé MJ, Mallavia R, Mateo CR. Use of the Conjugated Polyelectrolyte Poly{[9,9-bis(6′-N,N,N-trimethylammonium)hexyl]fluorene-phenylene} Bromide (HTMA-PFP) as a Fluorescent Membrane Marker. Biomacromolecules 2013; 14:1990-8. [DOI: 10.1021/bm400348n] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zehra Kahveci
- Instituto de Biología Molecular
y Celular, Universidad Miguel Hernández, 03202 Elche, Spain
| | | | - Ricardo Mallavia
- Instituto de Biología Molecular
y Celular, Universidad Miguel Hernández, 03202 Elche, Spain
| | - C. Reyes Mateo
- Instituto de Biología Molecular
y Celular, Universidad Miguel Hernández, 03202 Elche, Spain
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100
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Hughs M, Jimenez M, Khan S, Garcia-Garibay MA. Synthesis, Rotational Dynamics, and Photophysical Characterization of a Crystalline Linearly Conjugated Phenyleneethynylene Molecular Dirotor. J Org Chem 2013; 78:5293-302. [DOI: 10.1021/jo4004053] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Melissa Hughs
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569,
United States
| | - Miguel Jimenez
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569,
United States
| | - Saeed Khan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569,
United States
| | - Miguel A. Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569,
United States
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