Bright green-to-yellow emitting Cu(I) complexes based on bis(2-pyridyl)phosphine oxides: synthesis, structure and effective thermally activated-delayed fluorescence

Bright green-to-yellow emitting Cu(I) complexes based on bis(2-pyridyl)phosphine oxides: synthesis, structure and effective thermally activated-delayed fluorescence Full article

Journal

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

Output data

Year: 2018, Volume: 47, Number: 8, Pages: 2701-2710 Pages count : 10 DOI: 10.1039/c7dt04758d

Authors

Artem'ev Alexander V. ¹ , Ryzhikov Maxim R. ^1,2 , Taidakov Ilya V. ^3,4 , Rakhmanova Mariana I. ¹ , Varaksina Evgenia A. ³ , Bagryanskaya Irina Yu. ^2,5 , Malysheva Svetlana F. ⁶ , Belogorlova Nataliya A. ⁶

Affiliations

1	(Данные Web of science) Russian Acad Sci, Siberian Branch, Nikolaev Inst Inorgan Chem, 3 Akad Lavrentiev Ave, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Natl Res Univ, Dept Nat Sci, 2 Pirogova Str, Novosibirsk 630090, Russia
3	(Данные Web of science) Russian Acad Sci, PN Lebedev Inst Phys, Moscow 119991, Russia
4	(Данные Web of science) Dmitry Mendeleev Univ Chem Technol Russia, Miusskaya Sq 9, Moscow 125047, Russia
5	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, 9 Akad Lavrentiev Ave, Novosibirsk 630090, Russia
6	(Данные Web of science) Russian Acad Sci, Siberian Branch, AE Favorsky Irkutsk Inst Chem, 1 Favorsky Str, Irkutsk 664033, Russia

A family of brightly luminescent dinuclear complexes of [Cu(mu(2)-X)((NN)-N-boolean AND)](2) type (X = I or SCN) has been synthesized in 76-90% yields by the reaction of bis(2-pyridyl)phosphine oxides ((NN)-N-boolean AND) with the corresponding Cu(I) salts. The X-ray diffraction study reveals that the Cu2I2 core of the [Cu(mu(2)-I)((NN)-N-boolean AND)](2) complexes has either a butterfly-or rhomboid-shaped structure, while the eighth-membered [Cu((SCN)(NCS))Cu] ring in the [Cu-2(SCN)(2)((NN)-N-boolean AND)](2) complexes is nearly planar. In the solid state, these compounds exhibit a strong green-to-yellow emission (lambda(em)(max) = 536-592 nm) with high PLQYs (up to 63%) and short lifetimes (1.9-10.0 mu s). The combined photophysical and DFT study indicates that the ambient-temperature emission of the complexes obtained can be assigned to the thermally activated-delayed fluorescence (TADF) from the (1)(M + X)LCT excited state, while at 77 K, phosphorescence from the (3)(M + X) LCT state is likely observed.

Artem'ev A.V. , Ryzhikov M.R. , Taidakov I.V. , Rakhmanova M.I. , Varaksina E.A. , Bagryanskaya I.Y. , Malysheva S.F. , Belogorlova N.A.
Bright green-to-yellow emitting Cu(I) complexes based on bis(2-pyridyl)phosphine oxides: synthesis, structure and effective thermally activated-delayed fluorescence
Dalton Transactions. 2018. V.47. N8. P.2701-2710. DOI: 10.1039/c7dt04758d WOS Scopus РИНЦ

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