NRET from naphthalene labels in multilayer shell wall on melamine formaldehyde microparticles fabricated with layer-by-layer self-assembly to pyrene-labeled polyelectrolyte in solution

Core-shell colloidal particles were prepared with the core of monodisperse melamine formaldehyde particles (MF) with a diameter of 3.5 μm. The shell deposited on the core by the layer-by-layer (LbL) self-assembly was made with a copolymer ANp3 of 2-acrylamido-2-methylpropanesulfonate sodium (AMPS) and 3 mol% naphthalene label monomer and poly(diallyldimethylammonium chloride) (PD). Nonradiative energy transfer (NRET) from the naphthalene labels deposited on the MF particles to pyrene labels at a polyelectrolyte APy3, a copolymer of AMPS and 3 mol% pyrene label monomer, or to an ionic pyrene probe 1-pyrenemethylamine hydrochloride (PyMeA · HCl) in water was observed. The NRET efficiency was expressed as the emission intensity ratio I/I₀ of naphthalene with and without existence of pyrene in the surrounding solution. With increasing pyrene concentration, I/I₀ decreased down to about 0.2 and the mechanism for this NRET from the inner naphthalene label to the pyrene labels in solution is still ambiguous.     

SDS胶束对孔雀绿褪色反应的影响

研究了十二烷基硫酸钠（SDS）表而活性剂胶束和预胶束对孔雀绿褪色可逆反应的影响，建立了1－1型可逆反应的胶束催化模型和预胶束催化模型，获得了胶束相中正逆反应的速率常数和预胶束的平均聚集数．结果表明，SDS胶束和预胶束对正反应有禁阻作用，而对逆反应有催化作用．     

A DFT study of the generation of interstellar species XN (X = Cl, and Br) activated by molecular sieve clusters

A cluster DFT (B3LYP) calculation study of ClN₃ and BrN₃ dissociation pathways catalyzed by molecular sieve is reported. A three-tetrahedral molecular sieve cluster (Al(OHSiH₃)(OSiH₃)(OH)₂, called T3) has been chosen in this study. Triplet-state products ClN and BrN are more easily produced with T3 molecular sieve cluster. Although the potential energy surfaces with T3 molecular sieve cluster are similar with those without T3 molecular sieve cluster, the dissociation process of ClN₃ and BrN₃ with T3 molecular sieve cluster becomes easier, which can be attributed to smaller energy gaps from the ground state reactant to the intersystem crossing point.     

Elucidating dominant factors of PO43-, Cd2+ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars

Four distinct biochars were employed to remove three typical pollutants, meanwhile, path analysis, a multi-statistical regression method, was performed to elucidate the dominant factors of biochar adsorption. This work can provide a new insight to prepare a targeted biochar as adsorbents.     

离子液体作添加剂对高效液相色谱分离植物激素的影响

探讨了以离子液体作为液相色谱流动相添加剂,对植物激素赤霉素GA3、生长素IAA和脱落酸ABA的分离的影响,以及离子液体的烷烃链长度,阴离子及离子液体的浓度对分离的影响。结果表明:咪唑阳离子和植物激素通过静电作用而保留;植物激素本身的pKa值影响其保留因子,pKa值增大,离子液体浓度对植物激素保留因子影响增大;另外随[BMIM]对应的阴离子电负性的减小,植物激素的保留因子明显地增大;同时植物激素的空间位阻也影响其分离。     

Hydrogen bonding networks controllable by the substitution position of tetrathiafulvalene on the pyridine ring

Because of the effect of pyridine on the substituent position on the TTF group, TTF derivatives exhibit different assembly structures at the interface, which will be of great significance to the construction of functional nanostructures from the molecular design point of view.     

离聚体溶液

离聚体（ionomer）是指含离子基团低于15mol％的聚合物，这些离子基团能聚集成多重离子对[1]或离子簇[2-6]，使大分子链发生物理文联形成聚集体，导致性质起很大变化。例如常温下因物理交联而具有良好弹性，而高温时物理交联被破坏而具有流动性，所以离聚体能制成热塑性弹性体。由于物理交联存在，离聚体不能轻易溶于非极性溶剂中；由于离子含量低，又不易溶于水或其它强极性溶剂中．因此，尽管离聚体固体的研究和应用已有40多年的历史，但有关溶液研究的报导到70年代末才见发表[7-9]，近10年取得较大进展，其独特的粘度关系使人们考虑利用…     

反相高效液相色谱法分析无机阴离子研究

本文研究了提高ＲＰ－ＨＰＬＣ测定无机阴离子的选择性的方法，设计了利用对离子试剂和背景试剂兼作ｐＨ调节剂，建立了几种分离分析系统和实际样品分析方法。