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Li R, Fang Q, Chen M, Yamada M, Tsuji Y, Kugai Y, Li W, Kawai T. Synthesis and Photochromic Properties of Diaryl [5]Helicene Derivatives. Chemistry 2023; 29:e202302693. [PMID: 37749870 DOI: 10.1002/chem.202302693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 09/27/2023]
Abstract
Photoinduced tuning of aromaticity and correlative molecular properties has attracted enormous interest in recent years both for modulating photochromism properties and designing novel photochromic materials. Here, we report the synthesis and photochemical characterization of diaryl[5]helicene-based diarylethene molecular switches. 3,4-Bis(2,4-dimethyl-5-phenylthiophen-3-yl)dibenzo[c,g]phenanthrene derivative 1 a showed no photochromic reaction, whereas 3,4-bis(2-methyl-5-phenylthiophen-3-yl)dibenzo[c,g]phenanthrene derivative 2 a and 3,4-bis(5-methyl-2-phenylthiazol-4-yl)dibenzo[c,g]phenanthrene derivative 3 a exhibited reversible photochromism in different aprotic solvents with specific light irradiation. Meanwhile, the diarylethene compounds 2 a and 3 a underwent turn-off mode fluorescence photoswitching together with photoisomerization upon light irradiation. Remarkably, the photoinduced changes in the aromaticity of [5]helicene as a central ethene bridge along with the relative smaller activation energy and higher frequency factor facilitated the thermal bleaching rates of diarylethene switches 2 and 3 in solution. This research provides new insight for designing aromatic diarylethene photoswitches for reversible fluorescence switching, photoinduced changes in aromaticity and further fast thermal back reactions.
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Affiliation(s)
- Ruiji Li
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276826, P. R. China
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, 630-0192, Japan
| | - Qi Fang
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276826, P. R. China
| | - Minghui Chen
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276826, P. R. China
| | - Mihoko Yamada
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, 630-0192, Japan
| | - Yugo Tsuji
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, 630-0192, Japan
| | - Yusuke Kugai
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, 630-0192, Japan
| | - Wei Li
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276826, P. R. China
| | - Tsuyoshi Kawai
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara, 630-0192, Japan
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Manha Veedu R, Niemeyer N, Bäumer N, Kartha Kalathil K, Neugebauer J, Fernández G. Sterically Allowed H-type Supramolecular Polymerizations. Angew Chem Int Ed Engl 2023; 62:e202314211. [PMID: 37797248 DOI: 10.1002/anie.202314211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/05/2023] [Accepted: 10/05/2023] [Indexed: 10/07/2023]
Abstract
The functionalization of π-conjugated scaffolds with sterically demanding substituents is a widely used tactic to suppress cofacial (H-type) stacking interactions, which may even inhibit self-assembly. Contrary to expectations, we demonstrate herein that increasing steric effects can result in an enhanced thermodynamic stability of H-type supramolecular polymers. In our approach, we have investigated two boron dipyrromethene (BODIPY) dyes with bulky phenyl (2) and mesityl (3) meso-substituents and compared their self-assembly in nonpolar media with that of a parent meso-methyl BODIPY 1 lacking bulky groups. While the enhanced steric demand induces pathway complexity, the superior thermodynamic stability of the H-type pathways can be rationalized in terms of additional enthalpic gain arising from intermolecular C-H⋅⋅⋅F-B interactions of the orthogonally arranged aromatic substituents, which overrule their inherent steric demand. Our findings underline the importance of balancing competing non-covalent interactions in self-assembly.
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Affiliation(s)
- Rasitha Manha Veedu
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
| | - Niklas Niemeyer
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
- Universität Münster, Center for Multiscale Theory and Computation, Corrensstraße 36, 48149, Münster, Germany
| | - Nils Bäumer
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
| | - Krishnan Kartha Kalathil
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills, Kottayam, Kerala-686560, India
| | - Johannes Neugebauer
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
- Universität Münster, Center for Multiscale Theory and Computation, Corrensstraße 36, 48149, Münster, Germany
| | - Gustavo Fernández
- Universität Münster, Organisch-Chemisches Institut, Corrensstraße 36, 48149, Münster, Germany
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Černý J, Dokládalová L, Lyčka A, Mikysek T, Bureš F. Preparation, characterization and investigation of photo-physical properties of thiophene-substituted rare-earth bisphthalocyanines. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424617500018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Three bis[octakis-(2-thienyl)phthalocyaninato] rare-earth metal(III) phthalocyanine complexes (Pc[Formula: see text]Pr, Pc[Formula: see text]Sm, Pc[Formula: see text]Gd) were synthesized for the first time. The new compounds were characterized by UV-vis, NMR, FT-IR, mass spectroscopies as well as elemental analysis and electrochemistry. Production of singlet oxygen was also estimated by 9,10-dimethylanthracene method.
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Affiliation(s)
- Jiří Černý
- Center for Organic Chemistry, Rybitví č.p. 296, Rybitví 53354, Czech Republic
| | - Lenka Dokládalová
- Center for Organic Chemistry, Rybitví č.p. 296, Rybitví 53354, Czech Republic
| | - Antonín Lyčka
- Center for Organic Chemistry, Rybitví č.p. 296, Rybitví 53354, Czech Republic
| | - Tomáš Mikysek
- Department of Analytical Chemistry, University of Pardubice, Faculty of Chemical Technology, Studentská 573, Pardubice 53210, Czech Republic
| | - Filip Bureš
- Institute of Organic Chemistry and Technology, University of Pardubice, Faculty of Chemical Technology, Studentská 573, Pardubice 53210, Czech Republic
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Muthukumar P, Kim HS, Jeong JW, Son YA. Synthesis and characterization of tetra phenoxy-substituted halogen-rich metallophthalocyanine derivatives: A study on their LCD color filter requirements. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yi J, Chen Z, Xiang J, Zhang F. Photocontrollable J-aggregation of a diarylethene-phthalocyanine hybrid and its aggregation-stabilized photochromic behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8061-8066. [PMID: 21667954 DOI: 10.1021/la201197k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The photocontrollable J-aggregation of a diarylethene-phthalocyanine hybrid (T-ZnPc) and its aggregation-stabilized photochromic behavior were investigated by various techniques. T-ZnPc initially exhibited slight J-aggregation tendency in solvents such as chloroform and toluene through conformational planarization effect, but formed much stronger J-aggregates upon the illumination of 254 nm UV light. In darkness, the UV-irradiated solutions gradually returned to their initial state. These phenomena can be explained by the pronounced change in molecular planarity accompanying the reversible isomerization of the diarylethene units of T-ZnPc. Besides, we have found that the thermal stability of the closed-ring diarylethene isomers in molecularly dispersed T-ZnPc is much poorer than that in aggregates. As long as the aggregates were broken, they converted to corresponding open-ring form instantly. This study provided an example of fully photocontrollable aggregation of phthalocyanines and paved a new way for improving the stability of the photochromic systems.
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Affiliation(s)
- Jiaxiang Yi
- The Key Lab of Organic Photoelectrons & Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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Chen Z, Zhou X, Li Z, Niu L, Yi J, Zhang F. The third-order optical nonlinearities of thiophene-bearing phthalocyanines studied by Z-scan technique. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2010.12.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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