Selective gas sorption and electrochemical properties of a dicyanamide coordination polymer: Insight from experimental and theoretical study

Adsorption of Industrial Gases (CH4, CO2, and CO) on Olympicene: A DFT and CCSD(T) Investigation

Olympicene C₁₉H₁₂, an organic semiconductor, is investigated as an adsorption material for toxic industrial gas molecules such as CH₄, CO₂, and CO. A deep insight of complexation of CH₄, CO₂, and CO with olympicene (analyte@OLY) was obtained by interaction energy, symmetry-adopted perturbation theory (SAPT2+), quantum theory of atoms in molecules (QTAIM), density of states (DOS), noncovalent interaction (NCI), and frontier molecular orbital and natural bond orbital analysis. Domain-based local pair natural orbital coupled cluster theory single-point energy calculations were performed using the cc-pVTZ basis set in combination with corresponding auxiliary cc-pVTZ/JK and cc-pVTZ/C basis sets. For all property calculations of doped olympicene complexes, the ωB97M-V functional was employed. The stability trend for interaction energies is CO₂@OLY > CH₄@OLY > CO@OLY. QTAIM and NCI analysis confirmed the presence of NCIs, where the dispersion factor (in CH₄@OLY) has the highest contribution, as revealed from SAPT2+. The chemical sensitivity of the system was evidenced by the origination of new energy states in DOS spectra. The recovery time for the analyte@OLY complex was calculated at 300 K, and an excellent recovery response was observed. All results evidently indicated weak interactions of the olympicene surface with CH₄, CO₂, and CO.

Topological Motifs in Dicyanamides of Transition Metals

Dicyanamides of d-metals provide a wide range of magnetic properties tuned by external cations, encapsulated ions and coordination modes of anions. Analysis of molecular, one-periodic (1D chain), two-periodic (2D layered)...

Selective gas adsorption in microporous metal–organic frameworks incorporating urotropine basic sites: an experimental and theoretical study

Urotropine-based porous coordination polymers with free N-donors demonstrate selective adsorption towards acidic gas substrates (C₂H₂ or CO₂) as confirmed by isotherm measurements and ab initio DFT calculations.