Bio-Inspired Ni(II) Porphyrin Dimers with a Bridging Diphenyl Moiety: Facile Synthesis and Molecular Inherent Chirality

Abstract

Porphyrin dimers with amide-bonded 2,2'-and 4,4'-biphenyl moieties were synthesized and isolated. Both structural and spectroscopic characterizations were performed to in-depth understand the relationship between the helical molecular structure and inherent chirality of achiral 2,2'-biphenyl linked flexible porphyrin dimers.

Macrocyclic Receptors for Identification and Selective Binding of Substrates of Different Nature

“…Interest in the chemistry of porphyrins was first sparked by the participation of these compounds in photosynthesis. However, it has now turned in another direction as porphyrins can be used as selective molecular receptors for certain types of substrates [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. The fact that it is possible to chemically modify the tetrapyrrole molecule has enabled researchers to synthesize porphyrin conjugates with other macrocyclic compounds(porphyrin conjugates with calix[n]arenes [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ], cyclodextrines [ 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , ...…”