Since the discovery of its facile synthesis in 2001, meso-aryl-substituted expanded
porphyrins have been developed as a new class of azaannulenes in light of their facile …

The chemistry of expanded porphyrins, which are higher homologues of porphyrins, has
been intensively explored for the last three decades. Expanded porphyrins exhibit …

Recently, Baird (anti) aromaticity has been referred to as a description of excited-state (anti)
aromaticity. With the term of Baird's rule, recent studies have intensively verified that the …

This review underscores the conformational flexibility of porphyrinoids, a unique class of
functional molecules, starting from the smallest triphyrins (1.1. 1) via [18] porphyrins (1.1 …

The aromatic character of porphyrins, which has significant chemical and biological
consequences, can be substantially altered by judicious modifications of the parent ring …

The use of cyclic polyene perimeter-model approaches, such as Gouterman's four-orbital
model and Michl's perimeter model, to analyze trends in the electronic structures and optical …

Following immediately after the serendipitous discovery of N-confused porphyrins,
remarkably diverse carbaporphyrinoid systems have been synthesized and investigated. By …

Recently, expanded porphyrins have come to the forefront in the research field of
aromaticity, and been recognized as the most appropriate molecular system to study both …

Porphyrins and their related polypyrrolic conjugated macrocycles, porphyrinoids, have been
targets of intensive research from basic science to practical applications. Among them …

meso-Aryl-substituted expanded porphyrins that are porphyrin homologues consisting of
more than five pyrrolic units are a nice platform to realize diverse aromatic and antiaromatic …