Luminescence of a Zinc(II) Complex with a Protonated 1-Hydroxy-1H-imidazole ESIPT Ligand: Direct Excitation of a Tautomeric Form

Luminescence of a Zinc(II) Complex with a Protonated 1-Hydroxy-1H-imidazole ESIPT Ligand: Direct Excitation of a Tautomeric Form Full article

Journal

ChemistrySelect
ISSN: 2365-6549

Output data

Year: 2021, Volume: 6, Number: 44, Pages: 12346-12350 Pages count : 5 DOI: 10.1002/slct.202103695

Authors

Shekhovtsov N.A. ¹ , Ryadun A.A. ¹ , Bushuev M.B. ¹

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Akad. Lavrentiev Ave., Novosibirsk, 630090, Russia

The complex (HL)2[ZnCl4] (L=2-(1-hydroxy-4,5-dimethyl-1H-imidazol-2-yl)pyridine) featuring a short intramolecular hydrogen bond O−H⋅⋅⋅N (O⋅⋅⋅N 2.61 Å) in the HL+ cation is a rare example of protonated ESIPT-emitters (ESIPT=excited state intramolecular proton transfer). Photochemistry of (HL)2[ZnCl4] is dominated by the ESIPT tautomerization in HL+. In the solid state, (HL)2[ZnCl4] fluoresces in the sky-blue region (S1tautomeric→S0tautomeric, λmax=500 nm). In MeCN solution, two minima on the S1 potential energy curve lead to dual emission of (HL)2[ZnCl4] (S1normal→S0normal and S1tautomeric→S0tautomeric, λmax=368 and 417 nm). Energy barriers in the ground state allow trapping and the excitation of the tautomeric form of HL+.

Shekhovtsov N.A. , Ryadun A.A. , Bushuev M.B.
Luminescence of a Zinc(II) Complex with a Protonated 1-Hydroxy-1H-imidazole ESIPT Ligand: Direct Excitation of a Tautomeric Form
ChemistrySelect. 2021. V.6. N44. P.12346-12350. DOI: 10.1002/slct.202103695 OpenAlex

Submitted:	Oct 18, 2021
Accepted:	Nov 9, 2021
Published print:	Nov 23, 2021
Published online:	Nov 23, 2021

OpenAlex:

W3214780959

DB	Citing
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