The reversible binding of hydrogen sulfide (H2S) to hemeprotein sites has been attributed to several factors, likely working in concert, including the protected binding pocket environment, proximal hydrogen bond interactions, and iron ligation environment. To investigate the importance of a sterically-constrained, protected environment on sulfide reactivity with heme centers, we report here the...

The preparation of the shape-persistent carbosilane-functionalized porphyrins H2TPP(4-SiRR'Me)4, Zn(II)-TPP(4-SiRR'Me)4 (R = R' = Me, CH2CH=CH2, CH2CH2CH2OH; R = Me, R' = CH2CH=CH2, CH2CH2CH2OH; TPP = tetraphenyl porphyrin), H2TPP(4-Si(C6H4-1,4-SiRR'Me)3)4, and Zn(II)-TPP(4-Si(C6H4-1,4-SiRR'Me)3)4 (R = R' = Me, CH2CH=CH2; R = Me, R' = CH2CH[double bond, length as m-dash]CH2) using the Lindsey c...

Electrochemical reduction of CO2 to valuable products on molecular catalysts draws attention due their versatile structures allowing tuning activity and selectivity. Here, we investigate temperature influence conversion product selectivity over a Cobalt(II)-tetraphenyl porphyrin (CoTPP)/multiwalled carbon nanotube (MWCNT) composite in the range 20–50 ?. Faradaic efficiency changes with potentia...

The preparation of fullerene complexes with metal tetraarylporphyrins in the presence of excess ferrocene (Cp(2)Fe) results in the formation of new solvent-free and multicomponent molecular crystals. New isomorphous complexes of C(60) with PyZnTPP (ZnTPP identical with zinc 5,10,15,20-tetraphenyl-21H,23H-porphyrinate) and PyCoTPP (CoTPP identical with cobalt(II) 5,10,15,20-tetraphenyl-21H,23H-p...

The coverage-dependent self-assembly of Nickel-tetraphenyl porphyins on Gold vicinal surfaces was studied by scanning tunneling microscopy. On Au(788) the molecular is square-shaped, following symmetry. Au(332) molecules nucleate in a parallelogram lattice for monolayer coverage and squared multilayer coverage. Depending surface adopt either saddle shaped or more planar conformation. experiment...

Thin organic films are widely used in sensors, solar cells, and optical devices due to their intense absorption the visible/near-infrared (IR) region. Shifting, quenching, or reshaping of some spectral features can be achieved by chemical functionalization molecules, whereas an anisotropic fingerprint preferential molecular alignment induced via a proper design and/or preparation substrate. Rec...

The nucleation and growth of 2D layers of tetraphenyl porphyrin molecules on Ag(111) are studied with variable-temperature scanning tunneling microscopy. The organic/metal heteroepitaxy occurs by strict analogy to established principles for metal heteroepitaxy. A hierarchy of energy barriers for diffusion on terraces and along edges and around corners of adislands is established. The temperatur...