Temperature- and excitation wavelength-dependent emission in a manganese(II) complex

Temperature- and excitation wavelength-dependent emission in a manganese(II) complex Full article

Journal

Dalton Transactions
ISSN: 1477-9226 , E-ISSN: 1477-9234

Output data

Year: 2018, Volume: 47, Number: 5, Pages: 1657-1665 Pages count : 9 DOI: 10.1039/c7dt04535b

Authors

Berezin Alexey S. ¹ , Vinogradova Katerina A. ^1,2 , Nadolinny Vladimir A. ¹ , Sukhikh Taisiya S. ^1,2 , Krivopalov Viktor P. ³ , Nikolaenkova Elena B. ³ , Bushuev Mark B. ^1,2

Affiliations

1	(Данные Web of science) Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, 3 Acad Lavrentiev Ave, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia
3	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, 9 Acad Lavrentiev Ave, Novosibirsk 630090, Russia

A mononuclear manganese(II) complex with a chelating 4-(3,5-diphenyl-1H-pyrazol-1-yl)-6-(piperidin-1-yl)pyrimidine ligand (L), [MnL2Cl2]center dot H2O, shows intriguing excitation wavelength-dependent emission. Depending on the excitation wavelength, the complex demonstrates three emission bands with the maxima at 380 nm, 440 nm and 495 nm. The 380 nm and 440 nm emissions originate from the pi ->pi* and n ->pi* ligand-centered transitions. The long-wave 495 nm emission with microsecond lifetimes is related to the d-d transitions and/or metal-to-ligand and halogen-to-ligand charge transfer. The emission behavior of this complex is strongly temperature-dependent: upon cooling from 300K down to 77K, the intensity of emission considerably increases. The enhancement of the luminescence upon cooling is accompanied by the appearance of the vibrational structure. This complex is the first example of manganese(II) complexes demonstrating excitation wavelength-dependent emission.

Berezin A.S. , Vinogradova K.A. , Nadolinny V.A. , Sukhikh T.S. , Krivopalov V.P. , Nikolaenkova E.B. , Bushuev M.B.
Temperature- and excitation wavelength-dependent emission in a manganese(II) complex
Dalton Transactions. 2018. V.47. N5. P.1657-1665. DOI: 10.1039/c7dt04535b WOS Scopus РИНЦ

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