Switched energy transfer

Takakusa H, Kikuchi K, Urano Y, Kojima H, Nagano T (2003) A novel design method of ratiometric fluorescent probes based on fluorescence resonance energy transfer switching by spectral overlap integral. Chemistry 9 1479-1485... 

Stokes-shifted tautomer emission and high quantum yield in solid state (10%), DHBO was successfully used as an energy transfer donor in the photochromic switching system [88]. 

Figure 11. Schematic representation of the concept of a Figure 10 A, B, and C are suitably chosen chromophoric three-pole supramolecular switching of energy transfer. The groups. For more details, see the text, cartoons correspond to the molecular components shown in...

Bradley Moore andc o-workers167 have ingeniously applied vibrational lasers to the study of V-T and especially V-V energy transfer. The principle is to expose a gas sample to a Q-switched laser pulse and to monitor the infrared fluorescence... 

Otsuki, J., Akasaka, T. and Araki, K., Molecular switches for electron and energy transfer processes based on... 

Belser, P., De Cola, L., Hard, F., et al., Photochromic switches incorporated in bridging ligands A new tool to modulate energy-transfer processes. Advanced Functional Materials 2006, 16, 195-208. 

An extension of this study revealed that following selective excitation of the Ir(III)-based unit at 355 nm, rather than that of the porphyrin units at 532 nm, i.e., when the Ir center acts as a photosensitizer, the type of ensuing photoinduced process can be switched in the case of array (a), Fig. 27, from the electron transfer discussed above, to energy transfer [87]. 

Approaches to a Molecular Switch Using Photoinduced Electron and Energy Transfer... 

Switching systems based on photochromic behavior,I29 43,45 77-100 optical control of chirality,175 76 1011 fluorescence,[102-108] intersystem crossing,[109-113] electro-chemically and photochemical induced changes in liquid crystals,l114-119 thin films,170,120-1291 and membranes,[130,131] and photoinduced electron and energy transfer1132-1501 have been synthesized and studied. The fastest of these processes are intramolecular and intermolecular electron and energy transfer. This chapter details research in the development and applications of molecular switches based on these processes. 

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