Synthesis and structural studies (¹H,¹³C,³¹P NMR and X-ray) of new C-bonded cyclotriphosphazenes with heterocyclic substituents from novel phosphinic acid derivatives

Abstract

Bradford Scholars -how to deposit your paper Overview Copyright check• Check if your publisher allows submission to a repository.• Use the Sherpa RoMEO database if you are not sure about your publisher's position or email openaccess@bradford.ac.uk.

Organophosphorus π-Conjugated Materials

“…The exploration of phosphole-containing bithiophene systems is of interest due to their rigidified, planar structure, which inherently affords smaller HOMO−LUMO gaps for the materials relative to, for example, simple polythiophenes, where twisting from planarity can easily disrupt conjugation. , Although the first phosphorus-bridged bithiophene 225 (Scheme ) was published by Lampin and Mathey in 1974, trivalent phosphorus species 226 were only reported in 2003 by Baumgartner . In 2004, Cristau and co-workers published a cyclophosphazene featuring isomeric dithieno[2,3- b :3‘,2‘- d ]phosphole moieties 227 (Scheme ), but no photophysical properties were reported 46 …”

Oligothiophene Bearing 1-Hydroxy-1-oxodithieno[2,3-b:3′,2′-d]phosphole as a Novel Anchoring Group for Dye-sensitized Solar Cells

“…Dithienophosphole 1 was synthesized according to methods previously reported by Cristau et al 8 Then, dithienophosphole 1 was treated with N-bromosuccinimide (NBS) to yield dibromodithienophosphole 2. Terthiophene-linked dithienophosphole 3 was prepared by the Stille coupling of 2 with 5-tri(n-butyl)-stannyl-2,2¤:5¤,2¤¤-terthiophene.…”

Synthesis of Trispirocyclotriphosphazenes with Oxaphosphorine Rings and Their Crystal and Molecular Structures

“…Trispirocyclotriphosphazenes are usually synthesized by the reaction of hexachlorocyclotriphosphazene with difunctional compounds having reactive groups such as hydroxyl, amino, or thiol groups, e.g., catechol, 1,8-dihydroxynatharene, 2,2′-dihydroxy-biphenyl, 2,2′-dihydroxy-3,3′-bipyridine, or 2-aminobenzyl alcohol. The resulting cyclotriphosphazenes consequently possess trispiro substituents linked with P–O, P–N, or P–S bonds to the phosphorus atom of cyclotriphosphazene. − , On the contrary, there have been few reports of trispirocyclotriphosphazenes linked with P–C bonds and cyclized to the corresponding cyclophosphorus compounds, such as phosphafluorene or phospholodithiophene. − These cyclotriphosphazenes were synthesized by the Appel reaction from the corresponding cyclophosphorus compounds with triphenylphosphine, carbon tetrachloride, and a ternary amine such as trimethylamine or by a reaction of trichlorinated cyclophosphorus compounds with ammonia or ammonium chloride, and the crystal and molecular structure was determined by X-ray crystallography.…”