Synthesis and characterization of new molecular complexation between free base meso-tetraarylporphyrins and nitrosonium ion as π-acceptor

A meso-tetra-6b,10b-dihydrobenzo[j]cyclobut[a]acenaphthylene free-base porphyrin was synthesised and its photophysical, photochemical and electrochemical properties were compared with those of free-base meso-tetraphenylporphyrin. The frontier orbitals and the HOMO–LUMO energy gaps of both compounds were also determined. It was demonstrated that the meso6b,10b-Dihydrobenzo[j]cyclobut[a]acenaphthylene porphyrin retained the same properties as the tetraphenylporphyrin.

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Synthesis and characterization of intermediate sitting-atop (i-SAT) complexes of free base meso-tetraarylporphyrins and tin(IV) chloride

Polyhedron ◽

10.1016/j.poly.2008.05.017 ◽

2008 ◽

Vol 27 (13) ◽

pp. 2739-2742 ◽

Cited By ~ 16

Author(s):

Hossein Dehghani ◽

Mehrnoosh Babaahmadi

Keyword(s):

Synthesis And Characterization ◽

Free Base

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Synthesis and characterization of the most distorted 16π porphyrin: 16π octaisopropyltetraphenylporphyrin (OiPTPP)

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424611004233 ◽

2011 ◽

Vol 15 (11n12) ◽

pp. 1326-1334 ◽

Cited By ~ 11

Author(s):

Shun Sugawara ◽

Megumi Kodama ◽

Yusuke Hirata ◽

Satoshi Kojima ◽

Yohsuke Yamamoto

Keyword(s):

Time Course ◽

Novel Species ◽

Synthesis And Characterization ◽

Steric Repulsion ◽

The Novel ◽

Porphyrin Ring ◽

Free Base ◽

X Ray ◽

Metal Free

Previously unreported octaisopropyltetraphenylporphyrin (OiPTPP) was prepared from 3,4-diisopropylpyrrole, an unstable previously unisolated heterocyclic compound. Purification of the free-base 18π porphyrin required conversion to its 18π zinc(II) complex, chromatographic separation, and acid mediated demetalation. Oxidation of the 18π porphyrin with SbCl5 furnished metal-free 16π octaisopropyltetraphenylporphyrin (OiPTPP). X-ray structural determination revealed that the novel species is the most distorted 16π porphyrin to date. The time course of decomposition of the oxidized species monitored by UV-vis spectra implied that the introduction of high steric repulsion was effective for enhancing stability of the 16π porphyrin. The reaction of metal-free 16π OiPTPP with LiBF4 followed by Pd2(dba)3 gave the corresponding 18π OiPTPP palladium(II) complex via reduction of the OiPTPP lithium(I) complex as previously reported for 16π octaisobutyltetraphenylporphyrin (OiBTPP). The new 18π porphyrin system could be characterized by the X-ray analysis of the 18π OiPTPP palladium(II) complex. The X-ray structure of the 18π metal complex also indicated that the distortion of the porphyrin ring had become larger than that of previously known 18π porphyrins

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Synthesis and Characterization of Abacavir Acetic Acid Salt Polymorphic Transition from Abacavir Free Base by Using Process Analytical Tools (PAT)

Bioscience Biotechnology Research Communications ◽

10.21786/bbrc/13.15/36 ◽

2020 ◽

Vol 13 (15) ◽

pp. 207-211

Author(s):

Veeraswamy Rama

Keyword(s):

Acetic Acid ◽

Polymorphic Transition ◽

Synthesis And Characterization ◽

Acid Salt ◽

Free Base ◽

Analytical Tools

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