Notably, the methyl derivative 1a forms gels only in nitrobenzene, but analogues with longer alkyl end groups gel the relatively nonpolar solvents toluene and 1,2-dichlorobenzene. Likewise, the highest gelation capacities of 3-chlorobenzyl analogue 10a are observed in 1,2-dichlorobenzene, while 4-chlorobenzyl analogue 10c behaves as a gelator primarily in nitrobenzene. A clear trend is that compounds with more flexible and extended end groups are more likely to display gelation behavior.
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