Luminescent rhenium(I) phenanthroline complexes with a benzoxazol-2-ylidene ligand: Synthesis, characterization, and photophysical study

Chi-Chiu Ko; Chi-On Ng; Shek-Man Yiu

doi:10.1021/om300526e

Luminescent rhenium(I) phenanthroline complexes with a benzoxazol-2-ylidene ligand: Synthesis, characterization, and photophysical study

Chi-Chiu Ko, Chi-On Ng, Shek-Man Yiu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

41 Citations (Scopus)

Abstract

A series of luminescent rhenium(I) phenanthroline complexes containing benzoxazol-2-ylidene ligands with the general formula {Re(CO) ₃(phen)[CN(X)C ₆H ₄-2-O]} ⁺ and cis,trans-{Re(CO) ₂(phen)(L)[CN(H)C ₆H ₄-2-O]} ⁺ (X = H, methyl; phen = 1,10-phenanthroline; L = PPh ₃, PPh ₂Me, P(OEt) ₃) have been synthesized and characterized. The X-ray crystal structures of most of the carbene complexes and some of their synthetic precursors have also been determined. A new synthetic methodology for the preparation of dicarbonyl rhenium diimine synthetic precursors with a labile acetonitrile ligand, [Re(CO) ₂(phen)(PR ₃)(MeCN)] ⁺, was developed. Photophysical study shows that these carbene complexes display a green to red ³MLLCT [dπ(Re) → π*(N-N)] phosphorescence at room temperature. The N-deprotonations of the benzoxazol-2-ylidene ligand in these complexes were investigated. © 2012 American Chemical Society.

Original language	English
Pages (from-to)	7074-7084
Journal	Organometallics
Volume	31
Issue number	20
DOIs	https://doi.org/10.1021/om300526e
Publication status	Published - 22 Oct 2012

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title = "Luminescent rhenium(I) phenanthroline complexes with a benzoxazol-2-ylidene ligand: Synthesis, characterization, and photophysical study",

abstract = "A series of luminescent rhenium(I) phenanthroline complexes containing benzoxazol-2-ylidene ligands with the general formula {Re(CO) 3(phen)[CN(X)C 6H 4-2-O]} + and cis,trans-{Re(CO) 2(phen)(L)[CN(H)C 6H 4-2-O]} + (X = H, methyl; phen = 1,10-phenanthroline; L = PPh 3, PPh 2Me, P(OEt) 3) have been synthesized and characterized. The X-ray crystal structures of most of the carbene complexes and some of their synthetic precursors have also been determined. A new synthetic methodology for the preparation of dicarbonyl rhenium diimine synthetic precursors with a labile acetonitrile ligand, [Re(CO) 2(phen)(PR 3)(MeCN)] +, was developed. Photophysical study shows that these carbene complexes display a green to red 3MLLCT [dπ(Re) → π*(N-N)] phosphorescence at room temperature. The N-deprotonations of the benzoxazol-2-ylidene ligand in these complexes were investigated. {\textcopyright} 2012 American Chemical Society.",

author = "Chi-Chiu Ko and Chi-On Ng and Shek-Man Yiu",

year = "2012",

month = oct,

day = "22",

doi = "10.1021/om300526e",

language = "English",

volume = "31",

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journal = "Organometallics",

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TY - JOUR

T1 - Luminescent rhenium(I) phenanthroline complexes with a benzoxazol-2-ylidene ligand

T2 - Synthesis, characterization, and photophysical study

AU - Ko, Chi-Chiu

AU - Ng, Chi-On

AU - Yiu, Shek-Man

PY - 2012/10/22

Y1 - 2012/10/22

N2 - A series of luminescent rhenium(I) phenanthroline complexes containing benzoxazol-2-ylidene ligands with the general formula {Re(CO) 3(phen)[CN(X)C 6H 4-2-O]} + and cis,trans-{Re(CO) 2(phen)(L)[CN(H)C 6H 4-2-O]} + (X = H, methyl; phen = 1,10-phenanthroline; L = PPh 3, PPh 2Me, P(OEt) 3) have been synthesized and characterized. The X-ray crystal structures of most of the carbene complexes and some of their synthetic precursors have also been determined. A new synthetic methodology for the preparation of dicarbonyl rhenium diimine synthetic precursors with a labile acetonitrile ligand, [Re(CO) 2(phen)(PR 3)(MeCN)] +, was developed. Photophysical study shows that these carbene complexes display a green to red 3MLLCT [dπ(Re) → π*(N-N)] phosphorescence at room temperature. The N-deprotonations of the benzoxazol-2-ylidene ligand in these complexes were investigated. © 2012 American Chemical Society.

AB - A series of luminescent rhenium(I) phenanthroline complexes containing benzoxazol-2-ylidene ligands with the general formula {Re(CO) 3(phen)[CN(X)C 6H 4-2-O]} + and cis,trans-{Re(CO) 2(phen)(L)[CN(H)C 6H 4-2-O]} + (X = H, methyl; phen = 1,10-phenanthroline; L = PPh 3, PPh 2Me, P(OEt) 3) have been synthesized and characterized. The X-ray crystal structures of most of the carbene complexes and some of their synthetic precursors have also been determined. A new synthetic methodology for the preparation of dicarbonyl rhenium diimine synthetic precursors with a labile acetonitrile ligand, [Re(CO) 2(phen)(PR 3)(MeCN)] +, was developed. Photophysical study shows that these carbene complexes display a green to red 3MLLCT [dπ(Re) → π*(N-N)] phosphorescence at room temperature. The N-deprotonations of the benzoxazol-2-ylidene ligand in these complexes were investigated. © 2012 American Chemical Society.

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U2 - 10.1021/om300526e

DO - 10.1021/om300526e

M3 - RGC 21 - Publication in refereed journal

SN - 0276-7333

VL - 31

SP - 7074

EP - 7084

JO - Organometallics

JF - Organometallics

IS - 20

ER -

Luminescent rhenium(I) phenanthroline complexes with a benzoxazol-2-ylidene ligand: Synthesis, characterization, and photophysical study

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