ABSTRACT
Incorporating functional organic linkers into supertetrahedral chalcogenolate cluster-based materials is an effective synthetic strategy to expand structural diversity and generate tunable optical and photoelectric properties arising from synergistic effects. Herein, a mixed ligand engineering approach was adopted to design a supertetrahedral cluster-based assembled material [(Cd6Ag4(SPh)16(TPPA)(BPE)0.5)·2DMF]n (denoted as SCCAM-3) with a 2D bilayer architecture and broader visible-light absorption. Interestingly, SCCAM-3 demonstrates a long-lived afterglow at 83 K and efficient photocatalytic activity for degrading tetracycline in water.
ABSTRACT
Skin browning spot (SBS) is an important physiology disorder that often occurs in bagged fruit at the mature stage in the Huangguan (Pyrus bretschneideri × Pyrus pyrifolia) pear. Using atomic absorption spectrometry, X-ray microanalysis, and the potassium-pyroantimonate precipitation method, the water-soluble and total Ca(2+), Mg(2+), and K(+) contents, their microdistribution, and the Ca(2+) localization were investigated in bagged Huangguan pear fruit in the presence and absence of SBS. Our results show that the water-soluble and total Ca(2+) contents in both the skin and flesh tissue and the total Ca(2+) content only in the skin tissue of the fruits with SBS were significantly lower compared to those of the fruits without SBS. However, a higher K(+) content in the skin tissue was found in the fruits with SBS. There were no significant differences in the water-soluble and total Mg(2+) contents in the skin and flesh tissue between the fruits with and without SBS. In addition, the results of the X-ray microanalysis were consistent with changes in the total Ca(2+), Mg(2+), and K(+) contents in the skin and flesh tissue of the pear fruit that were affected by SBS. Compared to the skin tissue of pear fruit without SBS and the healthy part near the lesion zone of SBS, the lesion zone of SBS exhibited a high accumulation of Ca(2+) grains in the cell membrane of the epidermis cells, while fewer Ca(2+) grains were found in the vacuoles and cell walls. Altogether, these results indicate that Ca(2+) deficiency and the cellular Ca(2+) distribution in skin tissue contributed to the occurrence of SBS in bagged Huangguan pear fruit.
Subject(s)
Calcium, Dietary/metabolism , Fruit/chemistry , Pyrus/chemistryABSTRACT
In the title thio-cyanate-bridged polynuclear copper(II) complex, [Cu(C(10)H(12)NO(3))(NCS)](n), the Cu atom is five-coordinated in a square-pyramidal geometry, with one phenolato O, one imino N and one hy-droxy O atom of a Schiff base ligand and one thio-cyanato N atom defining the basal plane, and with one thio-cyanato S atom occupying the apical position. In the crystal structure, pairs of adjacent complex mol-ecules are linked through inter-molecular O-Hâ¯O hydrogen bonds into dimers. The dimers are further linked via Cuâ¯S inter-actions, forming two-dimensional layers parallel to the bc plane.
