In this representative case where R and R1 are each hydrogen, reductive amination of the triamine with an oligo-2,6-pyridine which contains an aldehyde group at the 6-position of the oligo-2,6-pyridine (i.e., at the 6-position of a terpyridine, at the 6-position of a quaterpyridine ring, etc.) can be accomplished using sodium cyanoborohydride or with hydrogen and a catalyst such as palladium on ca