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Investigation of Stability of Photosynthetic Reaction Center and Quantum Dot Hybrid Films

E. P. Lukashev, P. P. Knox*, I. P. Oleinikov, N. Kh. Seifullina, and N. P. Grishanova

Lomonosov Moscow State University, Biological Faculty, 119991 Moscow, Russia; fax: +7 (495) 939-1115; E-mail: knox@biophys.msu.ru

* To whom correspondence should be addressed.

Received June 10, 2015; Revision received June 23, 2015
The efficiency of interaction (efficiency of energy transfer) between various quantum dots (QDs) and photosynthetic reaction centers (RCs) from the purple bacterium Rhodobacter sphaeroides and conditions of long-term stability of functioning of such hybrid complexes in film preparations were investigated. It was found that dry films containing RCs and QDs and maintained at atmospheric humidity are capable to keep their functional activity for at least some months as judging by results of measurement of their spectral characteristics, efficiency of energy transfer from QDs to RCs, and RC electron-transport activity. Addition of trehalose to the films giving them still greater stability is especially expressed for films maintained at low humidity. These stable hybrid film structures are promising for further biotechnological studies for developing new phototransformation devices.
KEY WORDS: photosynthetic reaction center, quantum dots, energy transfer

DOI: 10.1134/S0006297916010065