To investigate the difference of surface oxygen element and oxygen-containing functional groups among coal dusts with different metamorphic degrees and their influence on surface wettability, a series of X-ray photoelectron spectroscopy experiments on 6 coal samples are carried out. The result demonstrates that the O/C ratio of coal surface shows an overall increasing trend compared with the re...

In the title compound, C(16)H(28)N(4)O(8)·2H(2)O, the 12-membered macrocycle has twofold crystallographic symmetry and the asymmetric unit comprises one half-mol-ecule. The four carbox-yl/carboxyl-ate groups reside on the same side of the macrocycle. The mol-ecule is a double zwitterion with two of the carb-oxy-lic acid H atoms transferred to the two N atoms on the opposite sides of the macrocy...

The dispersibility of cellulose nanocrystals (CNCs) differing ionic functional group content was investigated in both water and ethanol. CNC samples were prepared by hydrolyzing pulp with sulfuric acid (sulfate content: 0.35 mmol/g) included a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized material (carboxyl 2.0 mmol/g). To evaluate the CNCs each medium, measurement turbidity dispersed m...

The title compound [Cu(2)(C(6)H(3)BrNO(2))(4)](n), forms sheets in the bc plane. The structure features the dinuclear paddle-wheel cage motif common to copper(II) carboxyl-ates. The polymeric structure is achieved through bridging between binuclear units by the pyridyl donors of two of the four carboxyl-ates of the cage. Each cage engages in axial bonding at each copper atom to a pyridyl nitro-...

A novel sensing system was designed for pH measurements based on the enhanced and quenched photoluminescence (PL) UV–Vis absorption of diluted water solutions F-, O-, N-containing carbon nanoparticles (FON-CNPs). These FON-CNPs were solvothermally synthesized, dissolved, ultra-filtrated, separated by thin-layer chromatography. The total fluorine content in them found to be 1.2–1.5 mmol per gram...