Zeolite-entrapped ruthenium(II) complexes with bipyridine and related ligands. Elimination of ligand-field-state deactivation and increase in [sup 3]MLCT state lifetimes

Journal Article · Wed Sep 08 04:00:00 EDT 1993 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00071a049· OSTI ID:5067343

Maruszewski, K; Kincaid, J R ^[1]; Strommen, D P ^[2]

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1. Marquette Univ., Milwaukee, WI (United States)
2. Idaho State Univ., Pocatello, ID (United States)

Several homoleptic and bis-heteroleptic tris-ligated polypyridine complexes of Ru(II) have been prepared in the zeolite Y supercages. Ru(L)[sub n](L[prime])[sub 3[minus]n]-Y (where n = 0, 1, 2, 3 and L, L[prime] = bpy, dmb, mmb, and bpz) complexes have been investigated by electronic absorption, electronic emission, resonance Raman, and time-resolved resonance Raman spectroscopies. Excited-state lifetimes of the entrapped complexes have been measured and their temperature dependence established. While entrapment of the complexes in the zeolite matrix introduces no major modifications in structure or electron distribution, it does induce changes in the efficiency of various excited state energy dissipation pathways, the major effect being an increase in the energy of the metal-centered dd excited states which leads to elimination of one of the major decay and decomposition pathways. 33 refs., 6 figs., 3 tabs.

• OSTI ID: 5067343
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 115:18; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AZINES
BIPYRIDINES
CHEMICAL REACTIONS
COMPLEXES
CONVERSION
DEACTIVATION
DECOMPOSITION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY CONVERSION
ENERGY LEVELS
EXCITED STATES
HETEROCYCLIC COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIFETIME
LIGANDS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
RAMAN SPECTRA
RUTHENIUM COMPLEXES
SILICATE MINERALS
SOLAR ENERGY CONVERSION
SPECTRA
SPECTROSCOPY
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES
ZEOLITES