Theoretical study on BTF-based cocrystals: effect of external electric field

The external electric field plays an important role in the sensitivity of cocrystal energetic materials. To reveal the influence of external electric field on benzotrifuroxan/2,4,6-trinitroaniline (BTF/TNA), benzotrifuroxan/trinitroazetidine (BTF/TNAZ), benzotrifuroxan/1,3,5-trinitrobenzene (BTF/TNB), and benzotrifuroxan/trinitrotoluene (BTF/TNT) cocrystals' sensitivity, atoms in molecules (AIM), frontier molecular orbitals, nitro group charges (Q_NO2), electron density values (ρ), electrostatic surface potentials (ESPs), bond dissociation energy (E_BDE), and interaction energy (E_int) of the C-NO₂ bond were calculated by density functional theory at M062X-D3/ma-def2 TZVPP and B3LYP-D3/6-311 + G (d, p) levels in this article. The results indicate that both negative and positive electric fields reduce the energy gap of the BTF-based cocrystals, and BTF/TNAZ is the most sensitive cocrystal among the four cocrystals. For BTF/TNA and BTF/TNB, the E_BDE and the negative charge of the nitro group decreases with increasing positive electric field strength, the V_{s max} increases with positive electric field strength, and the sensitivity of cocrystal eventually tends to increase under the positive electric field. For BTF/TNAZ and BTF/TNT, the E_BDE and the negative charge of the nitro group decrease with increasing negative electric field strength, the V_{s max} increases with negative electric field strength, and the sensitivity of cocrystal eventually tends to increase under the negative electric field. Finally, the variation in bond length, nitro charge, and AIM electron density values are well correlated with the strengths of the external electric field.

Different Benzendicarboxylate-Directed Structural Variations and Properties of Four New Porous Cd(II)-Pyridyl-Triazole Coordination Polymers

Four new different porous crystalline Cd(II)-based coordination polymers (CPs), i. e., [Cd(mdpt)₂]·2H₂O (1), [Cd₂(mdpt)₂(m-bdc)(H₂O)₂] (2), [Cd(Hmdpt)(p-bdc)]·2H₂O (3), and [Cd₃(mdpt)₂(bpdc)₂]·2.5NMP (4), were obtained successfully by the assembly of Cd(II) ions and bitopic 3-(3-methyl-2-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (Hmdpt) in the presence of various benzendicarboxylate ligands, i.e., 1,3/1,4-benzenedicarboxylic acid (m-H₂bdc, p-H₂bdc) and biphenyl-4,4'-bicarboxylate (H₂bpdc). Herein, complex 1 is a porous 2-fold interpenetrated four-connected 3D NbO topological framework based on the mdpt^- ligand; 2 reveals a two-dimensional (2D) hcb network. Interestingly, 3 presents a three-dimensional (3D) rare interpenetrated double-insertion supramolecular net via 2D ···ABAB··· layers and can be viewed as an fsh topological net, while complex 4 displays a 3D sqc117 framework. Then, the different gas sorption performances were carried out carefully for complexes 1 and 4, the results of which showed 4 has preferable sorption than that of 1 and can be the potential CO₂ storage and separation material. Furthermore, the stability and luminescence of four complexes were performed carefully in the solid state.

High quantum yield and unusual photoluminescence behaviour in tetrahedral manganese(ii) based on hybrid compounds

High quantum yields and unusual luminescence characteristics were successfully achieved by regulating the organic cations in tetrahedral manganese(ii) complexes.

Lanthanide coordination frameworks constructed from 3,3′,4,4′-diphenylsulfonetetracarboxylic and 1,10-phenanthroline: synthesis, crystal structures and luminescence properties

Tb³⁺-Doped Eu³⁺ MOFs exhibit efficient white light emission and Tb-MOF displays a highly sensitive response toward Fe³⁺ ions.

Syntheses, structures, electrochemical and optical properties of four transition metal complexes based on the 1-triazolyl-3-benzimidazolyltriazene ligand

The crystal structures, electrochemical and optical properties of four transition metal complexes based on 1-triazolyl-3-benzimidazolyltriazene (H₃TBIT) ligand have been reported.

Assembly of a series of d10 coordination polymers based on W-shaped 1,3-di(2′,4′-dicarboxyphenyl)benzene: from syntheses, structural diversity, luminescence, to photocatalytic properties

Six d¹⁰ coordination polymers with different architectures based on W-shaped 1,3-di(2′,4′-dicarboxyphenyl)benzene (H₄DDB) have been prepared. Their photoluminescence and photocatalytic properties were also investigated.

Three new luminescent Cd(ii)-MOFs by regulating the tetracarboxylate and auxiliary co-ligands, displaying high sensitivity for Fe3+ in aqueous solution

Three new luminescent Cd(ii)-MOFs have been synthesized by regulating the steric effect of tetracarboxylate and auxiliary co-ligands. Notably, 3 displayed high sensitivity for Fe³⁺ in aqueous solution with mixed ions.

Structures and properties of coordination polymers involving asymmetric biphenyl-3,2′,5′-tricarboxylate

The conformation stability and coordination modes of an asymmetric polycarboxylate ligand (H₃bptc) and the properties of its compounds have been investigated.