Volume 8, Issue 4
Excited State Process of a Novel NIR-BODI Molecule in Toluene and Acetonitrile Solvents: A Theoretical Study

Jia Li, Meixia Zhang, Can Du, Peng Song & Xiaodong Li

J. At. Mol. Sci., 8 (2017), pp. 162-168.

Published online: 2017-08

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In this work, using DFT and TDDFT methods, we investigated the excited-state intramolecular proton transfer (ESIPT) mechanism of a novel NIR-BODI system [Org Biomol Chem 15:4072, 2017.] in both toluene and acetonitrile $({\rm CH}_3{\rm CN})$ solvents theoretically. Comparing the prime structural variations of NIR-BODI involved in the intramolecular hydrogen bond, we can conclude that O-H∙∙∙N should be strengthened in the $S_1$ state, which may facilitate the ESIPT process. Concomitantly, infrared vibrational spectra analysis further verify the stability of hydrogen bond. In good agreement with previous experimental results, NIR-BODI reveals two kinds of excited-state structures (NIR-BODI-enol* and NIR-BODI-keto*). Analysis about charge redistribution reveals the tendency of ESIPT process. Our scanned potential energy curves according to variational O-H coordinate demonstrates that the proton transfer process should be more likely to occur in the $S_1$ state due to the inappreciable potential energy barriers. In addition, due to the minute differences of potential energy curves contrasting toluene (the NIR-BODI-keto could be not located) and ${\rm CH}_3{\rm CN}$ (the NIR-BODI-keto can be located) solvents in $S_0$ state, we deem that solvent effect could play roles NIR-BODI system. Given the $S_1$-state potential energy barriers, we confirm that the ESIPT process is easier in ${\rm CH}_3{\rm CN}$ solvent.

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@Article{JAMS-8-162, author = {}, title = {Excited State Process of a Novel NIR-BODI Molecule in Toluene and Acetonitrile Solvents: A Theoretical Study}, journal = {Journal of Atomic and Molecular Sciences}, year = {2017}, volume = {8}, number = {4}, pages = {162--168}, abstract = {

In this work, using DFT and TDDFT methods, we investigated the excited-state intramolecular proton transfer (ESIPT) mechanism of a novel NIR-BODI system [Org Biomol Chem 15:4072, 2017.] in both toluene and acetonitrile $({\rm CH}_3{\rm CN})$ solvents theoretically. Comparing the prime structural variations of NIR-BODI involved in the intramolecular hydrogen bond, we can conclude that O-H∙∙∙N should be strengthened in the $S_1$ state, which may facilitate the ESIPT process. Concomitantly, infrared vibrational spectra analysis further verify the stability of hydrogen bond. In good agreement with previous experimental results, NIR-BODI reveals two kinds of excited-state structures (NIR-BODI-enol* and NIR-BODI-keto*). Analysis about charge redistribution reveals the tendency of ESIPT process. Our scanned potential energy curves according to variational O-H coordinate demonstrates that the proton transfer process should be more likely to occur in the $S_1$ state due to the inappreciable potential energy barriers. In addition, due to the minute differences of potential energy curves contrasting toluene (the NIR-BODI-keto could be not located) and ${\rm CH}_3{\rm CN}$ (the NIR-BODI-keto can be located) solvents in $S_0$ state, we deem that solvent effect could play roles NIR-BODI system. Given the $S_1$-state potential energy barriers, we confirm that the ESIPT process is easier in ${\rm CH}_3{\rm CN}$ solvent.

}, issn = {2079-7346}, doi = {https://doi.org/10.4208/jams.102617.120817a}, url = {http://global-sci.org/intro/article_detail/jams/12561.html} }
TY - JOUR T1 - Excited State Process of a Novel NIR-BODI Molecule in Toluene and Acetonitrile Solvents: A Theoretical Study JO - Journal of Atomic and Molecular Sciences VL - 4 SP - 162 EP - 168 PY - 2017 DA - 2017/08 SN - 8 DO - http://doi.org/10.4208/jams.102617.120817a UR - https://global-sci.org/intro/article_detail/jams/12561.html KW - AB -

In this work, using DFT and TDDFT methods, we investigated the excited-state intramolecular proton transfer (ESIPT) mechanism of a novel NIR-BODI system [Org Biomol Chem 15:4072, 2017.] in both toluene and acetonitrile $({\rm CH}_3{\rm CN})$ solvents theoretically. Comparing the prime structural variations of NIR-BODI involved in the intramolecular hydrogen bond, we can conclude that O-H∙∙∙N should be strengthened in the $S_1$ state, which may facilitate the ESIPT process. Concomitantly, infrared vibrational spectra analysis further verify the stability of hydrogen bond. In good agreement with previous experimental results, NIR-BODI reveals two kinds of excited-state structures (NIR-BODI-enol* and NIR-BODI-keto*). Analysis about charge redistribution reveals the tendency of ESIPT process. Our scanned potential energy curves according to variational O-H coordinate demonstrates that the proton transfer process should be more likely to occur in the $S_1$ state due to the inappreciable potential energy barriers. In addition, due to the minute differences of potential energy curves contrasting toluene (the NIR-BODI-keto could be not located) and ${\rm CH}_3{\rm CN}$ (the NIR-BODI-keto can be located) solvents in $S_0$ state, we deem that solvent effect could play roles NIR-BODI system. Given the $S_1$-state potential energy barriers, we confirm that the ESIPT process is easier in ${\rm CH}_3{\rm CN}$ solvent.

Jia Li, Meixia Zhang, Can Du, Peng Song & Xiaodong Li. (1970). Excited State Process of a Novel NIR-BODI Molecule in Toluene and Acetonitrile Solvents: A Theoretical Study. Journal of Atomic and Molecular Sciences. 8 (4). 162-168. doi:10.4208/jams.102617.120817a
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