PPA

polyphenyl acetylene
ポリフェニルアセチレン. 非線型光学材料.
polyphenyl acetylene; a π(pi)-electron conjugated amorphous material; easily soluble in organic solvents such as benzene; possesses good air-insensitivity; e.g. used as an NLO(nonlinear optical) material for DFWM(degenerate four-w

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