▎ 摘　　要

Following the establishment of graphene quantum dots as potential phthalocyanine supports in photoactive membrane preparation for phthalocyanines lacking linkage functional groups, the practical efficiency of pi-pi stacking versus covalent linkage was investigated. Synthesized materials were characterized using Fr-IR, Raman, powder X-ray diffraction, and UV Vis spectroscopies and also by transmission electron and scanning electron microscopies. Phthalocyanine loadings onto graphene quantum dots of 0.40 mg/mg and 0.14 mg/mg (Pc mass/conjugate mass) for the pi-pi stacked and covalent linked conjugates respectively were observed. Covalent linkage to graphene quantum dots proved to be functionally superior to pi-pi linkage, where singlet oxygen quantum yield value of the phthalocyanine in the membrane for the covalent linked conjugate was approximately twice that of the n-it stacked membrane. (C) 2018 Elsevier B.V. All rights reserved.