| http://www.w3.org/ns/prov#value | - Other amorphous materials include, for example, compounds 27-32: Each Ar1 and Ar2 is independently a substituted or unsubstituted aryl or heteroaryl, n is an integer in the range of 1 to 6, and each R1 is independently H, F, Cl, Br, I, ???SH, ???OH, alkyl, aryl, heteroaryl, fluoroalkyl, fluoroalkylalkoxy, alkenyl, alkoxy, amino, or alkyl-COOH. Each R3 is independently H, F, Cl, Br, I, alkyl, fluor
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