Supramolecular photochemistry and photophysics. Mutual inhibition of host and guest photochemistry and luminescence in the adduct of an anthraceno-crown ether with Pt(bpy)(NH sub 3 ) sub 2 sup 2+
- Dipartimento di Chimica G.Ciamician dell' Universita', Bologna (Italy)
- Istituto FRAE-CNR, Bologna (Italy)
- Universite de Bordeaux I, Talence (France)
Pt(bpy)(NH{sub 3}){sub 2}{sup 2+} forms a 1:1 adduct with the anthraceno-crown ether 2. The adduct formation causes (i) strong changes in the absorption spectra of the two components, (ii) the quenching of the luminescence and photoreactivity of both Pt(bpy)(NH{sub 3}){sub 2}{sup 2+} and 2, and (iii) the appearance of a new, broad, low-energy emission band at 77 K. It is suggested that the adduct exhibits a sandwich-type conformation in which the Pt complex is inserted between the two aromatic moieties of 2. Such a structure allows the stabilization of the adduct via both hydrogen bonds and {pi}-{pi} interactions and accounts for the mutual protection of the two components toward their luminescence and photoreactivity.
- OSTI ID:
- 5530138
- Journal Information:
- Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 95:5; ISSN JPCHA; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
ADDUCTS
ALCOHOLS
ANTHRACENE
AROMATICS
CHEMISTRY
COMPLEXES
CONDENSED AROMATICS
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
LOW TEMPERATURE
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHOTOCHEMISTRY
PLATINUM COMPLEXES
POLYETHYLENE GLYCOLS
POLYMERS
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES