Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes

Shun-Cheung Cheng; Shing-Lun Chan; David Lee Phillips; Chi-Chiu Ko

doi:10.1002/ejic.202200318

Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes

Shun-Cheung Cheng
, Shing-Lun Chan
, David Lee Phillips^*
, Chi-Chiu Ko^*

^*Corresponding author for this work

Department of Chemistry

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

Abstract

The excited-state dynamics of cyanide-bridged trinuclear carbonyl rhenium(I) complexes with general formula of [Re]_p-[Re]_c[Re]_p {[Re]_c=[(−NC)Re^I(CO)₂(phen)(CN−)]; [Re]_p=[−Re^I(CO)₂(L L)(L_a)], L L= diimine or diphosphine, L_a=triphenylphosphine or carbonyl ligand} and the monomeric peripheral control complexes have been elucidated through a study with ultrafast transient absorption spectroscopy. The time constants for the energy transfer between the MLCT excited states of the peripheral and central Re(I) chromophores (ca. 0.56–0.78 ps) are typical for other cyanide-bridged polynuclear transition metal complexes. The emissive excited states and the absorption transient have been characterized by nanosecond transient Raman spectroscopy.

Original language	English
Article number	e202200318
Journal	European Journal of Inorganic Chemistry
Volume	2022
Issue number	26
Online published	6 Jun 2022
DOIs	https://doi.org/10.1002/ejic.202200318
Publication status	Published - 19 Sept 2022

Funding

This work was supported by the General Research Fund (Project No. CityU 11306820) and a grant from City University of Hong Kong (Project No. 7005606).

Research Keywords

Cyanide ligands
Excited-state dynamics
Photophysics
Rhenium
Time-resolved spectroscopy

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RGC-funded

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10.1002/ejic.202200318

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@article{d41d2ab8afad42e6add2dc0441f56bc7,

title = "Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes",

abstract = "The excited-state dynamics of cyanide-bridged trinuclear carbonyl rhenium(I) complexes with general formula of [Re]p-[Re]c[Re]p \{[Re]c=[(−NC)ReI(CO)2(phen)(CN−)]; [Re]p=[−ReI(CO)2(L L)(La)], L L= diimine or diphosphine, La=triphenylphosphine or carbonyl ligand\} and the monomeric peripheral control complexes have been elucidated through a study with ultrafast transient absorption spectroscopy. The time constants for the energy transfer between the MLCT excited states of the peripheral and central Re(I) chromophores (ca. 0.56–0.78 ps) are typical for other cyanide-bridged polynuclear transition metal complexes. The emissive excited states and the absorption transient have been characterized by nanosecond transient Raman spectroscopy.",

keywords = "Cyanide ligands, Excited-state dynamics, Photophysics, Rhenium, Time-resolved spectroscopy",

author = "Shun-Cheung Cheng and Shing-Lun Chan and Phillips, \{David Lee\} and Chi-Chiu Ko",

year = "2022",

month = sep,

day = "19",

doi = "10.1002/ejic.202200318",

language = "English",

volume = "2022",

journal = "European Journal of Inorganic Chemistry",

issn = "1434-1948",

publisher = "Wiley-VCH Verlag GmbH",

number = "26",

}

TY - JOUR

T1 - Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes

AU - Cheng, Shun-Cheung

AU - Chan, Shing-Lun

AU - Phillips, David Lee

AU - Ko, Chi-Chiu

PY - 2022/9/19

Y1 - 2022/9/19

N2 - The excited-state dynamics of cyanide-bridged trinuclear carbonyl rhenium(I) complexes with general formula of [Re]p-[Re]c[Re]p {[Re]c=[(−NC)ReI(CO)2(phen)(CN−)]; [Re]p=[−ReI(CO)2(L L)(La)], L L= diimine or diphosphine, La=triphenylphosphine or carbonyl ligand} and the monomeric peripheral control complexes have been elucidated through a study with ultrafast transient absorption spectroscopy. The time constants for the energy transfer between the MLCT excited states of the peripheral and central Re(I) chromophores (ca. 0.56–0.78 ps) are typical for other cyanide-bridged polynuclear transition metal complexes. The emissive excited states and the absorption transient have been characterized by nanosecond transient Raman spectroscopy.

AB - The excited-state dynamics of cyanide-bridged trinuclear carbonyl rhenium(I) complexes with general formula of [Re]p-[Re]c[Re]p {[Re]c=[(−NC)ReI(CO)2(phen)(CN−)]; [Re]p=[−ReI(CO)2(L L)(La)], L L= diimine or diphosphine, La=triphenylphosphine or carbonyl ligand} and the monomeric peripheral control complexes have been elucidated through a study with ultrafast transient absorption spectroscopy. The time constants for the energy transfer between the MLCT excited states of the peripheral and central Re(I) chromophores (ca. 0.56–0.78 ps) are typical for other cyanide-bridged polynuclear transition metal complexes. The emissive excited states and the absorption transient have been characterized by nanosecond transient Raman spectroscopy.

KW - Cyanide ligands

KW - Excited-state dynamics

KW - Photophysics

KW - Rhenium

KW - Time-resolved spectroscopy

UR - https://www.scopus.com/pages/publications/85133450030

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85133450030&origin=recordpage

U2 - 10.1002/ejic.202200318

DO - 10.1002/ejic.202200318

M3 - RGC 21 - Publication in refereed journal

SN - 1434-1948

VL - 2022

JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 26

M1 - e202200318

ER -

Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes

Abstract

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GRF: Design and Synthesis of Luminescent Mechanochromic Polymers and Soft Materials From Luminescent Metal-Complex-Based Crosslinkers

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Excited-State Dynamics of Phosphorescent Trinuclear Re(I) Complexes

Abstract

Funding

Research Keywords

RGC Funding Information

Access Output

Other Access Options

Permanent Link

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GRF: Design and Synthesis of Luminescent Mechanochromic Polymers and Soft Materials From Luminescent Metal-Complex-Based Crosslinkers

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