New porphyrin 4 pi-cycloaddition reagents and their use in the preparationof porphyrin-(rigid spacer)-1,10-phenanthrolines in which geometric "tuning" of the chromophores is a feature
Rn. Warrener et al., New porphyrin 4 pi-cycloaddition reagents and their use in the preparationof porphyrin-(rigid spacer)-1,10-phenanthrolines in which geometric "tuning" of the chromophores is a feature, J ORG CHEM, 64(12), 1999, pp. 4218-4219