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A novel coordination polymer, {[Cd4(Ccbp)3(dpe)4·4H2O]·(ClO4)5·4H2O} (CP 1) (Ccbp = 3-carboxy-1-(3-carboxybenzyl)pyridin-1-ium, dpe = 1,2-di(pyridin-4-yl)ethane), was synthesized under hydrothermal conditions by a zwitterionic organic ligand and dipyridine ligand, and was fully characterized. This CP 1 with a pyridine cation basic skeleton can be used as the first potential dual-function luminescence sensing material for the selective, sensitive and recyclable sensing of acetone molecules in aqueous phase and for the quantitative detection of ultra-low temperatures of 10 to 70 K.

Social media technology creates an opportunity to shift the formation of impersonal relationships from offline to online. The theory of IT affordances provides a basis for theorizing how the use of online social commerce (OSC) technology facilitates the formation of social ties in an OSC context. In this paper, integrating theories of IT affordances and social ties, we develop a model to explore how the six sub-dimensions of OSC IT affordances (i.e., visibility, metavoicing, triggered attending, guidance shopping, social connecting, and trading) aid buyers and sellers in building strong and weak OSC ties. A survey of 511 buyers from WeChat shows that five of the six IT affordances enhance the quality of interactivity, and thereby facilitate social ties (both strong and weak), which in turn contribute to buyers’ repurchase intentions. Additionally, the findings confirm the positive moderating effect of perceived effectiveness of e-commerce institutional mechanisms (PEEIM) on the strong tie formation process. This paper advances the affordances and social tie literature by examining the antecedents and outcomes of OSC social ties in more detail. Our findings not only benefit the researchers in interpreting how technology helps form different types of relationships in OSC, but also assists practitioners in developing better OSC management strategy.

A novel red-emitting cationic iridium(III) coordination polymer using 2-(9-(2-ethylhexyl)-9H-carbazol-3-yl)benzo[d]thiazole as main ligands, 4,4′-bipyridine as bridging auxiliary ligands and Clˉ as anions was synthesized. It had high thermal stability with a thermal decomposition temperature (Td) of 345 °C and low thermal quenching with an activation energy (Ea) of 0.2760 eV, with the temperature increasing from 20 °C to 100 °C, its photoluminescent intensity decreased to 76.7%. It can be efficiently excited by blue light of GaN chips, the cold white light of GaN-based LEDs using only Y3Al5O12:Ce3+ (YAG:Ce, 7.0 wt% in silicone) as phosphors can become warmer when it was blended in. When blending concentrations were 0.1 wt% and 0.2 wt%, the cold white light became neutral white light, the correlated color temperature (CCT) decreased from 6157 K to 5240 K, then to 4043 K, the color rendering index (CRI) changed from 72.7 to 81.3, then to 78.6, the luminous efficiency (ηL) changed from 134.1 lm·w−1 to 61.9 lm·w−1, then to 46.3 lm·w−1, the Commission Internationale de L'Eclairage (CIE) chromaticity coordinates changed from (0.32, 0.33) to (0.34, 0.33), then to (0.38, 0.36). At 0.3 wt%, the light became warm white light, the corresponding CCT was 3475 K, CRI was 75.6, ηL was 36.9 lm·w−1, and CIE value was (0.41, 0.40). The results suggest the coordination polymer is a promising red-emitting phosphor candidate for neutral and warm white LEDs, especially for warm white LEDs.

We examine the impact of strategic deviance on corporate cash holdings and find that firms with strategies that deviate from their industry peers hold more cash. This pattern can be consistent with an agency motive, a precautionary motive, or both. We show that the value of cash holdings decreases with strategic deviance and that the cash effect of strategic deviance increases with agency costs but not with financial constraints, consistent with an agency motive. Finally, we find that strategically deviant firms pay lower dividends and avoid more taxes, both of which can potentially contribute to cash holdings. We conclude that strategically deviant firms hold more cash due to an agency motive.

Coherent beam combination (CBC) is an effective method to break the limiting power of a single fiber laser. The Q-learning algorithm is one of the reinforcement learning algorithms. We use the Q-learning algorithm to do phase compensation in the field of CBC. The performance difference between the Q-learning algorithm and the stochastic parallel gradient descent optimization algorithm (SPGD) is analyzed by simulating time-domain coherent synthesis. The results show that the Q-learning algorithm is easier to debug and has better stability.

Investigation of interaction mode of bovine serum albumin (BSA) and anthocyanin (ACN) in different solutions will help us understand the interaction mechanism and functional change of bioactive small molecule and biomacromolecule. This study investigated the binding mode, including binding constant, number of binding sites, binding force of BSA and ACN interaction in three buffer solutions of phosphate (PBS), sodium chloride (NaCl), and PBS-NaCl, using fluorescence spectroscopy and synchronous fluorescence spectroscopy. Formation and characteristics of BSA–ACN complex were also investigated using dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results showed that ACN could interact with BSA at both tyrosine (Tyr) and tryptophan (Trp) residues through both hydrogen bonds and van der Waals force, and the same binding mode was seen in dH 2 O and three buffer solutions. The value of binding constant K was decreased as the temperature increased from 298 K to 308 K, and the decreasing degree was in the order of dH 2 O (9.0×10 4 )>NaCl (2.64×10 4 )/PBS (2.37×10 4 )>PBS-NaCl (0.88×10 4 ), which was inversely correlated with the ionic strength of the buffer solutions of PBS-NaCl>NaCl>PBS. It indicated that stability of BSA–ACN complex was affected most in dH 2 O than in three buffer solutions. The BSA and ACN interaction led to formation of BSA–ACN nanoparticles. The sizes of BSA–ACN nanoparticles in dH 2 O were smaller than that in three buffer solutions, which correlated with stronger binding force between BSA and ACN in dH 2 O than in three buffer solutions at room temperature (25 °C, 298 K).

Modes and influencing factors of bovine serum albumin (BSA) and sulforaphane (SFN) interaction will help us understand the interaction mechanisms and functional changes of bioactive small molecule and biomacromolecule. This study investigated interaction mechanisms of BSA and SFN and associated antioxidant activity in three solvent systems of deionized water (dH2O), dimethyl sulfoxide (DMSO) and ethanol (EtOH), using Fourier transform infrared spectroscopy (FT-IR), fluorescence spectroscopy, synchronous fluorescence spectroscopy, DPPH and ABTS radical scavenging assays. The results revealed that SFN had ability to quench BSA's fluorescence in static modes, and to interact with BSA at both tyrosine (Tyr) and tryptophan (Trp) residues, while the Trp residues were highly sensitive, which was demonstrated by fluorescence at 340 nm. Hydrophobic forces, hydrogen bonds and van der Waals interactions were all involved in BSA and SFN interaction, which were not significantly changed by three solvents. The binding constant values and binding site numbers were in a descending order of dH2O>DMSO>EtOH. The values of free energy change were in a descending order of dH2O>DMSO>EtOH, which indicated that the binding forces were in a descending order of dH2O>DMSO>EtOH. There was no significant difference in antioxidant activity between SFN and BSA–SFN. Moreover, three solvents had not significant influence on antioxidant activity of SFN and BSA–SFN.