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Das P, Roy A, Nandi A, Neogi I, Diskin-Posner Y, Marks V, Pinkas I, Amer S, Kozuch S, Firer M, Montag M, Grynszpan F. Thioxobimanes. J Org Chem 2023; 88:13475-13489. [PMID: 37712568 PMCID: PMC10563133 DOI: 10.1021/acs.joc.3c00873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Indexed: 09/16/2023]
Abstract
Dioxobimanes, colloquially known as bimanes, are a well-established family of N-heterobicyclic compounds that share a characteristic core structure, 1,5-diazabicyclo[3.3.0]octadienedione, bearing two endocyclic carbonyl groups. By sequentially thionating these carbonyls in the syn and anti isomers of the known (Me,Me)dioxobimane, we were able to synthesize a series of thioxobimanes, representing the first heavy-chalcogenide bimane variants. These new compounds were extensively characterized spectroscopically and crystallographically, and their aromaticity was probed computationally. Their potential role as ligands for transition metals was demonstrated by synthesizing a representative gold(I)-thioxobimane complex.
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Affiliation(s)
- Partha
Jyoti Das
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Ankana Roy
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Ashim Nandi
- Department
of Chemistry, Ben-Gurion University, Beer Sheva 841051, Israel
| | - Ishita Neogi
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Yael Diskin-Posner
- Department
of Chemical Research Support, Weizmann Institute
of Science, Rehovot 76100, Israel
| | - Vered Marks
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Iddo Pinkas
- Department
of Chemical Research Support, Weizmann Institute
of Science, Rehovot 76100, Israel
| | - Sara Amer
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Sebastian Kozuch
- Department
of Chemistry, Ben-Gurion University, Beer Sheva 841051, Israel
| | - Michael Firer
- Department
of Chemical Engineering and Biotechnology, Ariel University, Ariel 40700, Israel
| | - Michael Montag
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
| | - Flavio Grynszpan
- Department
of Chemical Sciences, Ariel University, Ariel 40700, Israel
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Chwee TS, Lim GS, Wong ZC, Sullivan MB, Fan WY. Rapid intersystem crossings in anti bimanes. Phys Chem Chem Phys 2016; 18:7404-13. [PMID: 26898362 DOI: 10.1039/c6cp00424e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have carried out first principles electronic structure calculations on the ground and excited valence states of syn and anti bimanes. While syn bimanes fluoresce strongly after photoexcitation to the first excited singlet state (S1) and are commonly used as fluorophores in biological labeling studies, anti bimanes largely phosphoresce at low temperatures. We show that this is due to subtle differences in the energetic ordering of excited singlet and triplet states within the isomers. In particular, T2 in anti bimanes is characterized by a π→π* transition and large exchange interactions with the singlet counterpart cause it to lie below and energetically close to S1 at the Franck-Condon region. This opens up a pathway for very fast intersystem crossing (ca. 10(11) s(-1)) from the optically bright S1 state to the triplet manifold, which effectively quenches fluorescence. On the other hand, T2 is energetically inaccessible to S1 in syn bimanes and intersystem crossing via S1→ T1 cannot compete effectively with fluorescence to S0. We have also located minimum energy conical intersections between S0 and S1 in bimanes. However, these structures are significantly distorted from their equilibrium geometries as well as energetically much higher than S1 at the Franck-Condon region. They are therefore not expected to play a part in the photophysics of bimanes after excitation to S1.
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Affiliation(s)
- T S Chwee
- Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), 1 Fusionopolis Way, 138632, Singapore.
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Wong ZC, Fan WY, Chwee TS, Sullivan MB. Modelling fluorescence lifetimes with TD-DFT: a case study with syn-bimanes. RSC Adv 2016. [DOI: 10.1039/c6ra11495d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Syn-bimanes are a class of fluorophores that are widely used for labelling thiol containing biological systems. We used TD-DFT to study their absorption, emission, solvatochromism, and fluorescence lifetimes.
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Affiliation(s)
- Z. C. Wong
- Institute of High Performance Computing
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
- NUS Graduate School for Integrative Sciences and Engineering
| | - W. Y. Fan
- Department of Chemistry
- National University of Singapore
- Singapore
| | - T. S. Chwee
- Institute of High Performance Computing
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
| | - M. B. Sullivan
- Institute of High Performance Computing
- Agency for Science
- Technology and Research (A*STAR)
- Singapore
- Department of Chemistry
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Zheng J, Zhuang X, Qiu L, Xie Y, Wan X, Lan Z. Antiaromatic Characteristic Analysis of 1,4-Diazapentalene Derivatives: A Theoretical Study. J Phys Chem A 2015; 119:3762-9. [DOI: 10.1021/acs.jpca.5b00163] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie Zheng
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xuhui Zhuang
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Li Qiu
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yu Xie
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiaobo Wan
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
| | - Zhenggang Lan
- Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 Shandong, People’s Republic of China
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5
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The azido-tetrazole tautomerism in azoles and its relationships with aromaticity and NMR properties. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.04.119] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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