Dinuclear Ruthenium(II) Polypyridyl Complexes Containing Large, Redox-Active, Aromatic Bridging Ligands:  Synthesis, Characterization, and Intramolecular Quenching of MLCT Excited States

The syntheses and characterisation of a series of mononuclear and dinuclear ruthenium polypyridyl complexes based on the bridging ligands 1,3-bis-[5-(2-pyridyl)-1H-1,2,4-triazol-3-yl]benzene, 1,4-bis-[5-(2-pyridyl)-1H-1,2,4-triazol-3-yl]benzene, 2,5-bis-[5-(2-pyridyl)-1H-1,2,4-triazol-3-yl]thiophene, 2,5-bis-[5-pyrazinyl-1H-1,2,4-triazol-3-yl]thiophene are reported. Electrochemical studies indicate that in these systems, the ground state interaction is critically dependent on the nature of the bridging ligand and its protonation state, with strong and weak interactions being observed for thiophene- and phenylene-bridged complexes, respectively.

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Picosecond time-resolved infrared spectroscopic investigation into electron localisation in the excited states of Re(i) polypyridyl complexes with bridging ligands

Photochemical & Photobiological Sciences ◽

10.1039/b508335d ◽

2006 ◽

Vol 5 (1) ◽

pp. 82-87 ◽

Cited By ~ 8

Author(s):

Marina K. Kuimova ◽

Keith C. Gordon ◽

Sarah L. Howell ◽

Pavel Matousek ◽

Anthony W. Parker ◽

...

Keyword(s):

Excited States ◽

Spectroscopic Investigation ◽

Bridging Ligands ◽

Polypyridyl Complexes ◽

Time Resolved ◽

Infrared Spectroscopic

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Photocontrolled multiple-state photochromic benzo[b]phosphole thieno[3,2-b]phosphole-containing alkynylgold(I) complex via selective light irradiation

Nature Communications ◽

10.1038/s41467-021-27711-9 ◽

2022 ◽

Vol 13 (1) ◽

Author(s):

Nathan Man-Wai Wu ◽

Maggie Ng ◽

Vivian Wing-Wah Yam

Keyword(s):

Excited States ◽

Smart Materials ◽

Storage Capacity ◽

Optical Memory ◽

Color Changes ◽

Intramolecular Quenching ◽

Environmental Friendly ◽

Multiple State ◽

Complex Features ◽

Photochromic Materials

AbstractPhotochromic materials have drawn growing attention because using light as a stimulus has been regarded as a convenient and environmental-friendly way to control properties of smart materials. While photoresponsive systems that are capable of showing multiple-state photochromism are attractive, the development of materials with such capabilities has remained a challenging task. Here we show that a benzo[b]phosphole thieno[3,2‑b]phosphole-containing alkynylgold(I) complex features multiple photoinduced color changes, in which the gold(I) metal center plays an important role in separating two photoactive units that leads to the suppression of intramolecular quenching processes of the excited states. More importantly, the exclusive photochemical reactivity of the thieno[3,2‑b]phosphole moiety of the gold(I) complex can be initiated upon photoirradiation of visible light. Stepwise photochromism of the gold(I) complex has been made possible, offering an effective strategy for the construction of multiple-state photochromic materials with multiple photocontrolled states to enhance the storage capacity of potential optical memory devices.

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Reductive quenching of excited states of chromium(III)-polypyridyl complexes with alkyl aryl sulphides

Tetrahedron ◽

10.1016/s0040-4020(01)81300-4 ◽

1993 ◽

Vol 49 (21) ◽

pp. 4721-4740 ◽

Cited By ~ 14

Author(s):

George Allen Gnanaraj ◽

Seenivasan Rajagopal ◽

Chockalingam Srinivasan ◽

Kasi Pitchumani

Keyword(s):

Excited States ◽

Alkyl Aryl ◽

Polypyridyl Complexes

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Catalytic oxidation of ascorbic acid via copper–polypyridyl complex immobilized on glass

RSC Advances ◽

10.1039/c4ra00817k ◽

2014 ◽

Vol 4 (44) ◽

pp. 23168-23176 ◽

Cited By ~ 16

Author(s):

Vikram Singh ◽

Prakash Chandra Mondal ◽

Megha Chhatwal ◽

Yekkoni Lakshmanan Jeyachandran ◽

Michael Zharnikov

Keyword(s):

Ascorbic Acid ◽

Catalytic Oxidation ◽

High Performance ◽

Polypyridyl Complexes ◽

Polypyridyl Complex ◽

Redox Active ◽

Glass Support

A monolayer of redox-active copper–polypyridyl complexes on glass support was utilized for catalytic oxidation of ascorbic acid showing high performance.

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