Surface modification of graphene sheets with aluminum phthalocyanine complex

Abstract

Recently, it has become more and more obvious that the use of the unique physical properties of graphene is practically inexhaustible. In our work, we used the surface of oxygen-free graphene sheets to stabilize the AlClPc complex and prevent its agglomeration. A sonochemical method was developed for the preparation of stable suspensions of oxygen-free graphene in a DMF-aqua mixture, the composition and morphology of which were characterized using TEM, DLS, and Raman. Also, a method for the synthesis of hybrid structures based on AlClPc and graphene was developed, and new electrons interactions in them were determined by using of UV-VIS absorption spectroscopy. It was proved that these interactions are due to the graphene participation in surface complex with charge transfer. Graphene also prevents the agglomeration of the AlClPc complex, which is especially valuable for using the synthesized structure in biomedical research. The results obtained show how the use of molecular design techniques makes it possible to create new platforms for vector drag delivery and early diagnosis.

Keywords:

• Graphene-AlClPc systems
• oxygen-free graphene
• sonochemistry
• vibrational spectroscopy of graphene-containing structures
• UV-Vis absorption spectroscopy
• photodynamic therapy agents

Acknowledgments

The work was carried out according to government assignment no. 075-00328-21-00 and within the state assignment of IBCP RAS (theme No. 01201253304). The authors thank Asya M. Afzal (IMET RAS, Moscow) for preparation of graphene suspensions.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Authors contribution

Inna V. Klimenko: Proposing an idea and goal setting, writing of the presented manuscript, preparing reagents for the experiment, synthesis of hybrid structures, providing a pool of instrumental methods, investigation of the obtained suspensions using optical absorption spectroscopy method, interpretation of the results, graphic design of the submitted manuscript, preparing manuscript for publication. Elena A. Trusova: Development of a method for preparation of graphene suspensions, organization of experiment, participating in the interpretation of the results obtained, proposal of a mechanism for the hybrid surface complex formation, writing a manuscript, graphic design of the submitted manuscript and preparing it for publication. Alexander N. Shchegolikhin: Investigation of the graphene suspension using vibrational spectroscopy methods. Anton V. Lobanov: Participation in goal setting, participation in the development of preparation methodology, preparing reagents for the experiment. Lyubov V. Jurina: DLS studies of the graphene suspension.