The Chemical Modification of Poly-1, 6-DI-N-Carbazolyl-2, 4-Hexadiyne: Diffraction, Microscopy, and Magnetism Studies

Abstract

X-ray rotation photographs of brominated poly-1, 6-di-N-carbazolyl 2, 4-hexadiyne (DCH) reveal a chain axis repeat distance indicative of the preservation of a polydiacetylene (PDA) structure. Weissenberg photographs of a partially reacted poly-DCH crystal display evidence of the formation of a new crystalline phase. Electron microscopy of chemically modified poly-DCH reveals preservation of a fibrous morphology. The modified polymers do not appear sensitive to electron beam radiation during image formation. The reaction of poly-DCH with bromine has been monitored by electron spin resonance spectroscopy. The g-value increases significantly in the course of the bromination. Static susceptibility measurements of poly-DCH and other PDAs reveal that they are primarily diamagnetic materials.