Proton translocation and electronic relaxation along a hydrogen-bonded molecular wire in a 6-hydroxyquinoline/acetic acid complex.
A hydrogen-bonded network formed between 6-hydroxyquinoline (6-HQ) and acetic acid (AcOH) has been characterized using a time-resolved fluorescence technique. In the bridged hydrogen-bonded complex of cis-6-HQ and AcOH, an excited-state reaction proceeds via proton transfer along the hydrogen bond, resulting in a keto-tautomer (within approximately 200 ps) that exhibits large Stokes-shifted fluorescence. The unbridged complex also undergoes excited-state proton transfer, but the Stokes shift is rather smaller.
Photophysics Laboratory, Department of Physics, DSB Campus, Kumaun University, Nainital 263 002, Uttarakhand, India. msmehata@yahoo.com
Mohan Singh
MS
Mehata
D019342:Acetic Acid / Q000737:chemistry*; D004583:Electrons; D006860:Hydrogen Bonding; D006912:Hydroxyquinolines / Q000737:chemistry*; D015394:Molecular Structure; D010777:Photochemistry; D011522:Protons
D006912:Hydroxyquinolines; D011522:Protons; C071287:6-hydroxyquinoline; D019342:Acetic Acid