☆ 4.5 Article

Tris(rhenium fac-tricarbonyl) Polypyridine Functionalized Cyclotriguaiacylene Ligands with Rich and Varied Emission

ORGANOMETALLICS (2016)

Journal

ORGANOMETALLICS

Volume 35, Issue 11, Pages 1632-1642

Publisher

AMER CHEMICAL SOC

DOI: 10.1021/acs.organomet.6b00099

Keywords

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Categories

Chemistry, Inorganic & Nuclear Chemistry, Organic

Funding

EPSRC [EP/J001325/1, EP/K039202/1, DTG-2012]
EPSRC [EP/J001325/1, EP/K039202/1] Funding Source: UKRI
Engineering and Physical Sciences Research Council [EP/K039202/1, EP/J001325/1, 1238852] Funding Source: researchfish

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Abstract

Trinuclear rhenium fac-tricarbonyl bromide complexes have been synthesized coordinated to the host ligands tris(4- [4-methyl-2,2'-bipyridyl]methyl)cyclotriguaiacylene (L1), tris(4-[4-methyl-2,2'-bipyridoy1])cyclotriguaiacylene (L2), and tris(4-[2,2',6',2 ''-terpyridyllbenzyl)cydotriguaiacylene (L3). The structure of L1 and complexes [{Re(CO)(3)Br}(3)(L1)] (1) and [{Re(CO)(3)Br}(3)(L3)] (3) have been elucidated through X-ray single-crystal diffraction, with complex 3 crystallizing as a conglomerate. The steady-state luminescent properties and time-resolved fluorescence studies of the complexes have been conducted and revealed an unusual dual-emission phenomenon for complex 2. Complexes 1 and 2 show red-shifted emission wavelengths in comparison with those typical of monometallic Re(CO)(3)-bipy-Br complexes, while complex 3 showed an unusual excitation-dependent variation of emission wavelength.

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