Spectral Emissivity and Thermal Conductivity Properties of Black Aluminum Films.

Black aluminum is a material characterized by high surface porosity due to columnar growth and exhibits unique optical properties that make it attractive for applications such as light trapping, infrared detection, and passive thermal radiation cooling. In this study, we correlate the structural and optical properties of black aluminum by comparing it with conventional reflective aluminum layers. These layers of varying thicknesses were deposited on fused silica substrates, and their optical properties were analyzed.

Supramolecular motifs formed by CH/Cl-substituted arene groups: evidence for structural differences in thiophosphoramides and similarities in their complexes.

Differences/similarities of supramolecular motifs are discussed in two new thiophosphoramide structures and their Ni molecular complexes: (CHO)P(S)(NHC(S)NHCHCHX) and [{(CHO)P(S)(NC(S)NHCHCHX)}Ni] (X = Cl/CHI/II and III/IV). The structures have equal numbers of donor/acceptor sites contributing to classical hydrogen bonds (PS/CS and 2 × NH in ligands and 2 × PS and 2 × NH in the complexes). However, these donor and acceptor sites contribute to inter/intramolecular hydrogen bonding in ligands and intramolecular hydrogen bonding in complexes.

Microstructure and physical properties of black-aluminum antireflective films.

The microstructure and physical properties of reflective and black aluminum were compared for layers of different thicknesses deposited by magnetron sputtering on fused silica substrates. Reflective Al layers followed the Volmer-Weber growth mechanism classically observed for polycrystalline metal films. On the contrary, the extra nitrogen gas used to deposit the black aluminum layers modified the growth mechanism and changed the film morphologies.

POCl mediated one-pot deoxygenative aromatization and electrophilic chlorination of dihydroxy-2-methyl-4-oxo-indeno[1,2-]pyrroles.

A class of indenopyrroles is presented by the treatment of known dihydroxy-2-methyl-4-oxoindeno[1,2-]pyrroles with phosphorus oxychloride (POCl). The elimination of vicinal hydroxyl groups at the 3a and 8b positions, formation of a π bond, and electrophilic chlorination of the methyl group attached to C resulted in the fused aromatic pyrrole structures. Benzylic substitution of various nucleophiles such as HO, EtOH, and NaN with a chlorine atom gave diverse 4-oxoindeno[1,2-]pyrrole derivatives in 58 to 93% yields.

A novel water-soluble thiosemicarbazone Schiff base ligand and its complexes as potential anticancer agents and cellular fluorescence imaging.

A novel fluorescent ligand (HLCl⋅1.5CHOH, 1) was synthesized and metal complexes of 1 with Mn(II), Fe(III), Ni(II), Cu(II), and Zn(II) were obtained as Mn(HL)Cl (2), Fe(HL)Cl⋅3HO (3), Ni(L)(HL)Cl⋅8HO (4), Cu(HL)Cl⋅4HO (5), Zn(HL)Cl (6), respectively. These compounds were identified by spectroscopic methods, elemental analysis, molar conductivity, and single-crystal X-ray crystallography.