02406nas a2200217   4500008004100000022001400041245009200055210006900147260007100216300001600287490000600303520159700309653001801906653002701924653002101951653003101972653002202003100001802025700001702043856012802060       2014                        eng d  a1944-824400aRandom copolyesters containing perylene bisimide: flexible films and fluorescent fibers0 aRandom copolyesters containing perylene bisimide flexible films   a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAUG  a12457-124660 v63 a<p>Random copolyesters of poly(L-lactic acid) (PLLA) and [poly-(1,4-cyclohexylenedimethylene-1,4- cyclohexanedicarboxylate)] (PCCD) incorporating varying mol ratios of perylene bisimide (PBI) were developed via a high-temperature solution-blending approach. PCCD incorporating PBI was developed by melt polycondenzation followed by a polyester-polyester transesterification reaction between PCCD PBI and PLLA. The polymers exhibited good solubility in common organic solvents and formed free-standing films, which showed bright red emission upon irradiation with ultraviolet radiation. A solid state fluorescence quantum yield of 10% was observed for this PBI based polyester, which was much higher than that reported in literature for PBI based polymers in the solid state (&lt;1%). Strong red fluorescent nanofibers of these polymers were successfully constructed by electrospinning technique. A random copolyester incorporating donor based on oligo(p-pheneylenevinylene) (OPV) and PBI as acceptor chromophore was also synthesized and fluorescence microscopy images of the electrospun fibers of this polymer exhibited blue, green and red emission upon excitation at different wavelengths. The high temperature solution blending approach involving a high molecular weight polymer and a suitably functionalized it conjugated molecule described here is a unique method by which 1D nanostructures of a wide range of pi-conjugated chromophores could be fabricated having strong fluorescence, with the scope of application in nanoscale optoelectronics, biological devices, as well as sensing.</p>10aflexible film10afluorescent nanofibers10aluminescent film10aoligo(p-phenylenevinylene)10aperylene bisimide1 aNisha, Kumari1 aAsha, S., K.  uhttps://library.ncl.res.in/content/random-copolyesters-containing-perylene-bisimide-flexible-films-and-fluorescent-fibers-0