wherein X is a halide and R1, R2, R3, and R4 are selected from H and C1-C20 alkyl chains, which may be linear or branched, further wherein the alkyl chain may optionally contain an aromatic moiety and wherein at least one of the R1-R4 is a C4-C30 alkyl chain, which may be linear or branched any may optionally contain a aromatic moiety.