Venkata S. Pavan K. Neti

Design, Synthesis, and X‐Ray Crystal Structure of a Fullerene‐Linked Metal–Organic Framework

Given the unique structural and electronic properties of C60 , metal-organic frameworks (MOFs) containing C60 linkers are expected to exhibit interesting characteristics. A new hexakisfullerene derivative possessing two pairs of phenyl pyridine groups attached to two methano-carbon atoms located at the trans-1 positions was designed and synthesized. The four pyridyl nitrogen atoms define a perfectly planar rectangle. This new C60 derivative was used to assemble the first fullerene-linked two-dimensional MOF by coordination with Cd(2+) .

High and selective CO2 adsorption by a phthalocyanine nanoporous polymer

A rigid macrocyclic phthalocyanine-based porous polymer, CPP, was synthesized by a one pot “click” reaction between tetraazido-phthalocyanine and bisamine diethynylbenzene. This CPP is the first example of a phthalocyanine porous polymer used for CO2 adsorption and it shows very high CO2 adsorption (15.7 wt% at 273 K/1 bar) and high selectivity for CO2/N2 (94) and for CO2/CH4 (12.8) at 273 K/1 bar. The CPP exhibited a Brunauer–Emmett–Teller (BET) surface area of 579 m2 g−1 and high thermal stability up to 500 °C, thus showing good potential for CO2 capture.

High yield synthesis of a new fullerene linker and its use in the formation of a linear coordination polymer by silver complexation

A new hexakis-fullerene adduct with two 4,5-diazafluorene groups strategically located at trans-1 positions to allow linear polymerization was selectively synthesized in very high yield. By reaction with Ag(triflate), a one dimensional metal-organic coordination polymer was obtained.

Selective CO2 adsorption in a porphyrin polymer with benzimidazole linkages

A new nanoporous porphyrin-based benzimidazole linked polymer, PBILP, was synthesized. The use of porphyrin monomers as molecular building units led to the formation of a rigid amorphous network that has a moderate surface area (SBET = 557 m2 g−1). The CO2 adsorption ability of PBILP is 12.1 wt% (2.76 mmol g−1) and it has a CO2/CH4 selectivity of 7.2 at 273 K/1 bar and a CO2/N2 selectivity of 72 at 273 K/1 bar.

Solvothermal synthesis and crystal structure of a 3-D hexagonal metal-porphyrin coordination network

A hexagonal-shaped hybrid metal-porphyrin framework containing 5,15-di(4-pyridyl)-10,20-diphenylporphyrin (trans-H2DPyP) and Zn(NO3)26H2O in DMF has been self-assembled solvothermally. The solvothermal reaction of Zn(II) with conformationally versatile 5,15-di(4-pyridyl)-10,20-diphenylporphyrin, which can coordinate axially to two ligands, resulted in metalation of the porphyrin core and then self-coordination of the metalated porphyrin-produced single crystals of 3-D polymeric arrays. The trans-ZnDPyP framework is thermally stable at 450 °C and allows solvent exchange without losing the crystal structure.

Synthesis of a Polyimide Porous Porphyrin Polymer for Selective CO2 Capture

A new microporous porphyrin-based imide linked polymer, PyP, was synthesized in an m-cresol/isoquinoline mixture between a porphyrin and a naphthalene tetra-carboxylic dianhydride. The resultant amorphous polymer demonstrates a moderate surface area (SBET = 428 m2 g−1) and CO2 adsorption ability (3.5 wt%) and a CO2/CH4 selectivity of 5.6 at 273 K/1 bar.