Dual 3(d - D) emission of [RhL2Cl2](PF6) (L≡2,2′-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range 77-536 K

Ashraful Islam; Noriaki Ikeda; Koichi Nozaki; Takeshi Ohno

doi:10.1016/S1010-6030(97)00040-3

Dual ³(d - D) emission of [RhL₂Cl₂](PF₆) (L≡2,2′-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range 77-536 K

Ashraful Islam, Noriaki Ikeda, Koichi Nozaki, Takeshi Ohno^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Emission kinetic spectroscopy of [Rh(2,2′-bipyridine)₂Cl₂](PF₆) and [Rh(1,10-phenanthroline)₂Cl₂](PF₆) was studied in crystalline form up to 536 K. A dramatic shift of the emission peak from 14 600 cm^-1 to 12 800 cm^-1 and an increase in the full width at half-maximum of the whole spectrum from 2850 cm^-1 to 5450 cm^-1 were observed for [Rh(2,2′-bipyridine)₂Cl₂](PF₆) with increasing temperature from 77 to 536 K. The unusual spectral change with temperature can be interpreted in terms of a two ³(d - d) emitting states model. The Franck-Condon energies for the ³(d - d) emissions are determined to be about 3700 cm^-1 for the excited state of ³(d - d)₁ and 6400 cm^-1 for the excited state of ³(d - d)₂. The non-radiative transition of ³(d - d)₁ occurs via the following successive processes: ³(d - d)₁→³(d - d)₂→ground state. The well-displaced potential curve of ³(d - d)₂ lowers the activation energy of the non-radiative process above 350 K.

Original language	English
Pages (from-to)	61-66
Number of pages	6
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	106
Issue number	1-3
DOIs	https://doi.org/10.1016/S1010-6030(97)00040-3
State	Published - 1997/06/01

Keywords

Dual (d - d) emission
Emission kinetic spectroscopy
[RhLCl](PF) (L≡2,2′-bipyridine, 1,10-phenanthroline)

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

Access to Document

10.1016/S1010-6030(97)00040-3

Cite this

@article{2a662ed265fc4c288247b28e63287478,

title = "Dual 3(d - D) emission of [RhL2Cl2](PF6) (L≡2,2′-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range 77-536 K",

abstract = "Emission kinetic spectroscopy of [Rh(2,2′-bipyridine)2Cl2](PF6) and [Rh(1,10-phenanthroline)2Cl2](PF6) was studied in crystalline form up to 536 K. A dramatic shift of the emission peak from 14 600 cm-1 to 12 800 cm-1 and an increase in the full width at half-maximum of the whole spectrum from 2850 cm-1 to 5450 cm-1 were observed for [Rh(2,2′-bipyridine)2Cl2](PF6) with increasing temperature from 77 to 536 K. The unusual spectral change with temperature can be interpreted in terms of a two 3(d - d) emitting states model. The Franck-Condon energies for the 3(d - d) emissions are determined to be about 3700 cm-1 for the excited state of 3(d - d)1 and 6400 cm-1 for the excited state of 3(d - d)2. The non-radiative transition of 3(d - d)1 occurs via the following successive processes: 3(d - d)1→3(d - d)2→ground state. The well-displaced potential curve of 3(d - d)2 lowers the activation energy of the non-radiative process above 350 K.",

keywords = "Dual (d - d) emission, Emission kinetic spectroscopy, [RhLCl](PF) (L≡2,2′-bipyridine, 1,10-phenanthroline)",

author = "Ashraful Islam and Noriaki Ikeda and Koichi Nozaki and Takeshi Ohno",

year = "1997",

month = jun,

day = "1",

doi = "10.1016/S1010-6030(97)00040-3",

language = "英語",

volume = "106",

pages = "61--66",

journal = "Journal of Photochemistry and Photobiology A: Chemistry",

issn = "1010-6030",

publisher = "Elsevier B.V.",

number = "1-3",

}

TY - JOUR

T1 - Dual 3(d - D) emission of [RhL2Cl2](PF6) (L≡2,2′-bipyridine and 1,10-phenanthroline) in a crystal in the temperature range 77-536 K

AU - Islam, Ashraful

AU - Ikeda, Noriaki

AU - Nozaki, Koichi

AU - Ohno, Takeshi

PY - 1997/6/1

Y1 - 1997/6/1

N2 - Emission kinetic spectroscopy of [Rh(2,2′-bipyridine)2Cl2](PF6) and [Rh(1,10-phenanthroline)2Cl2](PF6) was studied in crystalline form up to 536 K. A dramatic shift of the emission peak from 14 600 cm-1 to 12 800 cm-1 and an increase in the full width at half-maximum of the whole spectrum from 2850 cm-1 to 5450 cm-1 were observed for [Rh(2,2′-bipyridine)2Cl2](PF6) with increasing temperature from 77 to 536 K. The unusual spectral change with temperature can be interpreted in terms of a two 3(d - d) emitting states model. The Franck-Condon energies for the 3(d - d) emissions are determined to be about 3700 cm-1 for the excited state of 3(d - d)1 and 6400 cm-1 for the excited state of 3(d - d)2. The non-radiative transition of 3(d - d)1 occurs via the following successive processes: 3(d - d)1→3(d - d)2→ground state. The well-displaced potential curve of 3(d - d)2 lowers the activation energy of the non-radiative process above 350 K.

AB - Emission kinetic spectroscopy of [Rh(2,2′-bipyridine)2Cl2](PF6) and [Rh(1,10-phenanthroline)2Cl2](PF6) was studied in crystalline form up to 536 K. A dramatic shift of the emission peak from 14 600 cm-1 to 12 800 cm-1 and an increase in the full width at half-maximum of the whole spectrum from 2850 cm-1 to 5450 cm-1 were observed for [Rh(2,2′-bipyridine)2Cl2](PF6) with increasing temperature from 77 to 536 K. The unusual spectral change with temperature can be interpreted in terms of a two 3(d - d) emitting states model. The Franck-Condon energies for the 3(d - d) emissions are determined to be about 3700 cm-1 for the excited state of 3(d - d)1 and 6400 cm-1 for the excited state of 3(d - d)2. The non-radiative transition of 3(d - d)1 occurs via the following successive processes: 3(d - d)1→3(d - d)2→ground state. The well-displaced potential curve of 3(d - d)2 lowers the activation energy of the non-radiative process above 350 K.

KW - Dual (d - d) emission

KW - Emission kinetic spectroscopy

KW - [RhLCl](PF) (L≡2,2′-bipyridine, 1,10-phenanthroline)

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DO - 10.1016/S1010-6030(97)00040-3

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