Chitosan nanocomposites with CdSe/ZnS quantum dots and porphyrin

F A Sewid; K I Annas; A Dubavik; A V Veniaminov; V G Maslov; A O Orlova

doi:10.1039/d1ra08148a

Chitosan nanocomposites with CdSe/ZnS quantum dots and porphyrin

RSC Adv. 2022 Jan 4;12(2):899-906. doi: 10.1039/d1ra08148a. eCollection 2021 Dec 22.

Authors

F A Sewid^{1

2}, K I Annas¹, A Dubavik¹, A V Veniaminov¹, V G Maslov¹, A O Orlova¹

Affiliations

¹ ITMO University St. Petersburg 197101 Russia fayzaomar8891@gmail.com a.o.orlova@gmail.com.
² Faculty of Science, Mansoura University Egypt.

Abstract

Water-soluble nanocomposites based on CdSe/ZnS quantum dots (QDs) and hydrophobic tetraphenylporphyrin (TPP) molecules passivated by chitosan (CS) have been formed. Magnetic circular dichroism (MCD) spectra evidence TPP presence in both monomeric and agglomerated forms in the nanocomposites. The nanocomposites demonstrate more pronounced singlet oxygen generation compared to free TPP in CS at the same concentration due to the intracomplex Förster resonance energy transfer (FRET) with a 45% average efficiency.