Synthesis Crystal Structure and Photophysical Properties of Some Organic Donor and#960; Acceptor Intramolecular Charge Transfer Materials

Abstract

Organic donorand#8210;and#960;and#8210;acceptor (Dand#8210;and#960;and#8210;A) materials involving intramolecular charge transfer have emerged as a significant class of novel materials in recent years due to their potential application in organic solid-state light emitting diodes (OLED) and nonlinear optics. Modern optoelectronic devices, such as OLEDs, field effect transistors and organic solar cells require well controlled motion of charges for their efficient operation. Organic materials having combination of donor (D) and acceptor (A) moieties, connected through and#960;-conjugated spacer, can show broad visible region absorption and narrow optical band gaps due to the intramolecular charge transfer (ICT) character between the donor and acceptor groups. These molecular properties are prerequisite for the materials to show efficient photophysical properties. Also, there are unlimited design possibilities by varying the length of and#61552;-conjugation or changing the donor and/or acceptor groups for making superior to organic materials. newline