NDLI: Enhanced photostability of chlorophyll-<i>a</i> using gold nanoparticles as an efficient photoprotector

Content Provider	Royal Society of Chemistry (RSC)
Author	Hotchandani, Surat Bekalé, Laurent Barazzouk, Saïd
Copyright Year	2012
Abstract	Improving the photostability of chlorophylls is one of the main challenges to facilitate their industrial and biotechnological use. In this regard, we have employed gold nanoparticles (AuNPs) to photoprotect chlorophyll-a (Chla). The results show that the photodegradation of Chla is slowed down in the presence of AuNPs, and an increase of as much as an order of magnitude in half-life time of Chla in the presence of AuNPs has been observed. It is further seen that under in vitro conditions, AuNPs are much better photoprotective agents of Chla than β-carotene or quinones, which are known to be very effective under natural living conditions (plants). The protecting ability of Chla by AuNPs is the result of their efficient binding with Chla at its nitrogen sites even in the dark, thus inhibiting the reaction of reactive oxygen species with Chla, known to cause its degradation during illumination. The same property of AuNPs, i.e., to bind with Chla in the dark, renders them to be a better photoprotectant than carotene or quinones since these agents offer protection to Chla during its illumination.
Starting Page	25316
Ending Page	25324
Page Count	9
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	48
Journal	Journal of Materials Chemistry
DOI	10.1039/c2jm33681b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Chla Chlorophyll a Photodegradation Half-life Beta-Carotene Nitrogen Reactive oxygen species Photoprotection Carotene
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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