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Pandey MK, Mondal D, Kote BS, Balakrishna MS. Synthesis and Photophysical Properties of Heavier Pnictogen Complexes. Chempluschem 2023; 88:e202200460. [PMID: 36756696 DOI: 10.1002/cplu.202200460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/02/2023] [Accepted: 02/02/2023] [Indexed: 02/10/2023]
Abstract
Recent success in the synthesis of π-conjugated heavier pnictogen (As, Sb, and Bi) compounds and their transition metal complexes has led to the current surge in interest that led to significant development in the field of photophysical and optoelectronic properties of heavier pnictogens and their transition metal complexes. The presence of heavier pnictogens (As, Sb and Bi) in the molecular skeleton promotes inter-system crossing (ISC) and reverse inter-system crossing (RISC), because of the heavy atom effect, via altering the intermolecular interactions and orbital energy levels. As a result, π-conjugated heavier pnictogen compounds such as arsines, dibenzoarsepins, arsinoquinoline, heterofluorene, benzo[b]heterole (heterole=arsole, bismole, and stibole) show unique optoelectronic properties such as narrow bandgap, low-energy absorption, and long-wavelength emission than lighter pnictogen-based compounds. This review focuses on recent advances in the synthesis and photophysical properties of heavier pnictogen compounds. The synthesis and photophysical properties of heavier pnictogens are discussed and elaborated.
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Affiliation(s)
- Madhusudan K Pandey
- Phosphorus Laboratory Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Dipanjan Mondal
- Phosphorus Laboratory Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Basvaraj S Kote
- Phosphorus Laboratory Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Maravanji S Balakrishna
- Phosphorus Laboratory Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
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Iwasaki S, Miyake Y, Imoto H, Naka K. 1,2,5‐Triarylcycloalka[
c
]arsoles: Structural Effects of Fused‐cycloalkanes on Stability and Photophysical Properties. Chemistry 2022; 28:e202202084. [DOI: 10.1002/chem.202202084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho Matsugasaki, Sakyo-ku, Kyoto 606-8585 Japan
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Takahara C, Iwasaki S, Kihara H, Miyake Y, Imoto H, Naka K. 4-Aryldithieno[3,2- b:2',3'- d]arsoles: effects of the As-substituent on the structure, photophysical properties, and stability. Dalton Trans 2022; 51:13734-13741. [PMID: 36004456 DOI: 10.1039/d2dt02051c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dithieno[3,2-b:2',3'-d]arsole (DTA) is one of the representative arsenic-containing conjugated units. In this work, the effects of the As-substituent on the structure, photophysical properties, and stability were investigated. Surprisingly, the As-substituent affected the structural relaxation and stability in the photo-excited state, while there was negligible effect in the ground state. Bulky substituents resulted in red-shifted emissions due to the relaxation of steric repulsion upon photo-excitation. In addition, the crystal structure highly affected the photo-degradation behaviors.
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Affiliation(s)
- Chisa Takahara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Suzuka Iwasaki
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hyota Kihara
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. .,Materials Innovation Lab, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Development of Long Wavelength Light-Absorptive Homopolymers Based on Pentaazaphenalene by Regioselective Oxidative Polymerization. Polymers (Basel) 2021; 13:polym13224021. [PMID: 34833319 PMCID: PMC8619047 DOI: 10.3390/polym13224021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 12/23/2022] Open
Abstract
We report the synthesis and absorption properties of homopolymers consisting of 1,3,4,6,9b-pentaazaphenalene (5AP). Oxidative polymerization in the Scholl reaction was accomplished, and various lengths of homopolymers can be isolated. It should be noted that we scarcely observed the generation of structural isomers at the connecting points, which is often observed in this type of reaction. Therefore, we were able to evaluate electronic structures of the synthesized homopolymers. In addition, it was observed that absorption bands were obtained in the longer wavelength region than the monomer. The computer calculation suggests that the highest occupied molecular orbital (HOMO) energy levels could be lowered by electronic interaction through spatially-separated HOMOs of 5AP. Moreover, we can evaluate the extension of the conjugated system through the meta-substituted skeleton and distance dependency of the main-chain conjugation.
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Kihara H, Imoto H, Naka K. Practical Syntheses and Luminescent Properties of Arene‐substituted Arsines. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hyota Kihara
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Hiroaki Imoto
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Kensuke Naka
- Faculty of Molecular Chemistry and Engineering Graduate School of Science and Technology Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
- Materials Innovation Lab Kyoto Institute of Technology Goshokaido-cho, Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
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