Demonstration of intramolecular energy transfer in asymmetric bimetallic ruthenium(II) complexes

Bar Manoranjan; Maity Diesh; Das ShyamalBaitalik Sujoy

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Demonstration of intramolecular energy transfer in asymmetric bimetallic ruthenium(II) complexes

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A new family of bimetallic Ru(II) complexes derived from an asymmetric bridging ligand (tpy-Hbzim-dipy) consisting of both bipyridine and terpyridine chelating sites covalently connected via phenyl-imidazole spacer were designed in this work to demonstrate intramolecular energy transfer from one component to the other in asymmetric dyads. To fine tune the photo-redox properties, both bidentate and tridentate terminal ligands in the complexes were varied systematically. Both steady state and time-resolved luminescence spectral results indicated photo-induced intramolecular energy transfer from the excited MLCT state of the (bpy/phen) Ru-2(II)(dipy-Hbzim-tpy) component to the MLCT state of the tpy-containing unit (dipy-Hbzim-tpy) Ru-II(tpy-PhCH3/H(2)pbbzim) in dyads with rate constant values on the order of 10(6)-10(7) s(-1). Temperature-dependent luminescence studies indicated an enhancement in the luminescence intensity and excited state lifetimes upon decreasing the temperature.

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《Dalton transactions: An international journal of inorganic chemistry》 |2016年第43期|17241-17253|共13页
作者
Bar Manoranjan; Maity Diesh; Das ShyamalBaitalik Sujoy;
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Univ Jadavpur, Dept Chem, Inorgan Chem Sect, Kolkata 700032, India;

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正文语种英语
中图分类化学;无机化学;
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Demonstration of intramolecular energy transfer in asymmetric bimetallic ruthenium(II) complexes

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