Photophysical and electrochemical properties of chlorophyll a-cyclodextrins complexes.
In this work, we have studied the interactions between two different cyclodextrins (CDs) and chlorophyll a (Chl a) in the presence of electrolyte by means of absorption, fluorescence spectroscopy, circular dichroism and cyclic voltammetry. The results obtained indicate that the presence of both CDs gives rise to an increase of Chl a solubility in water. In particular, heptakis-(2,3,6-tri-O-methyl)-beta-cyclodextrin (TRIMEB) favours the dissolution of Chl a monomer in aqueous solution, whereas the presence of hydroxypropyl-beta-cyclodextrin (beta-HP-CD) promotes the pigment aggregation.
Dentuto
Pasquale Luca
PL
Dipartimento di Chimica, Università di Bari, via Orabona 4 I-70126 Bari, Italy.
Catucci
Lucia
L
Cosma
Pinalysa
P
Fini
Paola
P
Agostiano
Angela
A
D000073738:2-Hydroxypropyl-beta-cyclodextrin; D002734:Chlorophyll / Q000737:chemistry* / Q000528:radiation effects*; D000077194:Chlorophyll A; D045424:Complex Mixtures / Q000737:chemistry / Q000528:radiation effects; D003505:Cyclodextrins / Q000737:chemistry* / Q000528:radiation effects*; D019281:Dimerization; D004563:Electrochemistry / Q000379:methods; D008027:Light; D046911:Macromolecular Substances; D010777:Photochemistry / Q000379:methods; D011485:Protein Binding / Q000528:radiation effects; D012995:Solubility / Q000528:radiation effects; D014867:Water / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry* / Q000528:radiation effects*
D045424:Complex Mixtures; D003505:Cyclodextrins; D046911:Macromolecular Substances; D047392:beta-Cyclodextrins; C487420:heptakis(2,3,6-tri-O-methyl)cyclomaltoheptaose; D014867:Water; D002734:Chlorophyll; D000073738:2-Hydroxypropyl-beta-cyclodextrin; D000077194:Chlorophyll A