TY - JOUR
T1 - Aggregation of chlorophylls in monolayers
T2 - Part IV. The reorganisation of chlorophyll a in multilayer array
AU - Chapados, Camille
AU - Germain, Denis
AU - Leblanc, Roger
PY - 1980
Y1 - 1980
N2 - The nature of the interaction between the chlorophyll a molecules in multilayer arrays obtained by the Langmuir-Blodgett technique is examined by electronic and infrared spectroscopies. Following the deposition of the multilayers, we observed a blue shift with time in the electronic spectra. This effect is monitored by infrared spectroscopy. The intensity of the coordinated ketone band is decreased while the intensity of the free ketone band is increased. These modifications are explained by the reorganization of the chlorophyll a molecules from an organized to a less organized one. The influence of H2O, D2O and SO2 vapors on the chlorophyll a multilayers give some informations on the role of water molecules in the aggregation of chlorophyll a in this ordered system. From these observations, a model is proposed for the multilayer arrangement implying two molecules of water per molecule of chlorophyll a.
AB - The nature of the interaction between the chlorophyll a molecules in multilayer arrays obtained by the Langmuir-Blodgett technique is examined by electronic and infrared spectroscopies. Following the deposition of the multilayers, we observed a blue shift with time in the electronic spectra. This effect is monitored by infrared spectroscopy. The intensity of the coordinated ketone band is decreased while the intensity of the free ketone band is increased. These modifications are explained by the reorganization of the chlorophyll a molecules from an organized to a less organized one. The influence of H2O, D2O and SO2 vapors on the chlorophyll a multilayers give some informations on the role of water molecules in the aggregation of chlorophyll a in this ordered system. From these observations, a model is proposed for the multilayer arrangement implying two molecules of water per molecule of chlorophyll a.
UR - http://www.scopus.com/inward/record.url?scp=84989755722&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989755722&partnerID=8YFLogxK
U2 - 10.1016/0301-4622(80)80051-2
DO - 10.1016/0301-4622(80)80051-2
M3 - Article
AN - SCOPUS:84989755722
VL - 12
SP - 189
EP - 198
JO - Biophysical Chemistry
JF - Biophysical Chemistry
SN - 0301-4622
IS - 2
ER -