Starting from some meso-methyl Bodipy dyes, the corresponding meso-styryl derivatives were synthesized by regioselective Knoevenagel-type condensation with different aromatic aldehydes. The reactions were driven by the alleviation of the structural strain of the alkyl substituted Bodipys that could override the differential acidities of the methyl protons at the pyrrole ring of the Bodipy moiety.

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Bodipy laser dyes are highly efficient but degrade rapidly in solution by reacting with in situ generated singlet oxygen ((1)O(2)). To increase the lasing lifetimes of these dyes, we have designed and synthesised two different congeners of the widely studied Pyrromethene 567 (PM567) by substitution at the boron centre and/or at both the boron centre and the meso position. The two new dyes showed high lasing efficiencies with increased photostability. The results of theoretical and pulse radiolysis studies revealed that the substitution at the boron centre reduced the (1)O(2) generation capacity of these dyes as well as their rate of reaction with (1)O(2), thereby enhancing their lifetimes even under lasing conditions.

Amongst the various porphyrinoids, octaphyrin has attracted significant attention owing to its diverse syntheses, conformations, and metal-ligationp roperties. Octaphyrin is ah igher homologue of porphyrin and is formed by linking together heterocycles such as pyrrole, furan, thiophene, ands elenophene through a-a or a-meso carbon bonds. The planar conformation is mainly achievedt hrough inversion of the heterocyclic units from the center of macrocycle;a voiding meso-bridges;introducing a para-quinodimethane bridge;e mployinganeo-confusion approach; protonation;a nd by generating dianionics pecies. In this Focus Review,r ecent synthetic advancements in the field of octaphyrins are summarized.T he twisted conformation of the octaphyrinb inds to two metal ions in at etracoordinate geometry.T he diphosphorus complex of octaphyrin represents the first example of as table expanded isophlorin.

Using simple surface chemistry, rectification characteristics can be tuned to reproducible negative differential resistance (NDR) with a very high peak-to-valley ratio (PVR) up to 1000 in BODIPY grafted on Si.

Arylselenolate-based copper complexes have been synthesized and used as pre-catalysts for azide-alkyne cycloaddition reactions.

This perspective begins with the discussion of various basic synthetic approaches applied for the synthesis of several organotellurium ligands, their chemistry derived from platinum group metals, and the reactivity difference among them.

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