[Ru(bpy)2dppz]2+ electrochemiluminescence (ECL) was studied, and it was used to investigate DNA interaction and develop a label-free ATP aptasensor for the first time. ECL of [Ru(bpy)2dppz]2+ is negligible in aqueous solution, and increases approximately 1000 times when [Ru(bpy)2dppz]2+ intercalates into the nucleic acid structure. The ECL switch behavior of [Ru(bpy)2dppz]2+ is ascribed to the intercalation that shields the phenazine nitrogens from the solvent and results in a luminescent excited state. The ECL switch by DNA was applied to investigate the interaction of [Ru(bpy)2dppz]2+ with herring sperm DNA. The calculated equilibrium constant (K) is 1.35 x 10(6) M(-1), and the calculated binding-site size (s) is 0.88 base pair, which is consistent with the reported values. Moreover, ATP can dramatically affect ECL of the [Ru(bpy)2dppz]2+/ATP aptamer complex. As a result, a label-free, sensitive, and selective [Ru(bpy)2dppz]2+ ECL method for ATP detection was developed. The detection limit is 100 nM for ATP (with a signal-to-noise ratio, S/N, of 3) with a linear range of 0-1 microM. The result demonstrates that [Ru(bpy)2dppz]2+ ECL holds great promise in aptasensors.

A V-shaped aromatic ligand 1,3-di(4-carboxyphenyl)benzene (H 2 DCPB), just retaining one branch of the H 6 TDCPB ligand, was utilized. The assembly of this ligand with Zn(II) ion forms a two-fold interpenetrated porous MOF with pcu topology . The N 2 adsorption isotherm of the activated sample at 77 K revealed a type-I microporous characteristic. The BET and Langmuir surface areas are calculated to be 503.7 m 2 g -1 and 718.9 m 2 g -1 , respectively. Notably, by fluorescence technique, JUC-10 135 can be used to detect nitroaromatic explosives. Especially, it is one of the most efficient porous material-based sensors for TNP (K SV = 3.7 × 10 4 M -1 ). Furthermore, JUC-135 also can distinguish TNP (blue-shift) from NB, 1, 3-DNB and 2, 4-DNT (red-shift) through shift direction of fluorescent spectra. 65 a 2θ range of 4-40° at room temperature. Thermogravimetric analyses (TGA) were performed with a Perkin-Elmer TGA thermogravimetric analyzer at a heating rate of 10 °C/min in the range of 30-800 °C under air flow for all measurements. Elemental analyses (C, H and N) were performed on a Perkin-70 Elmer 240 analyzer. Fourier-transform infrared spectra (FT-IR) Journal Name, [year], [vol], 00-00 | 3 65intensity of JUC-135 was reduced by 25.49%, 25.67%, 34.44%, 95.02% upon exposure to NB, 1, 3-DNB, 2, 4-DNT and TNP of 40 ppm, respectively (Fig. S6). The obtained data indicated that TNP is detected most effectively ( Fig. 4d and Fig. S5b-5d), which is mainly attributed to the three nitro groups in TNP. With 70 increasing -NO 2 groups, electron transfer becomes easier, which leads to more efficient fluorescence quenching. [56,57]

ZIF-8 crystal coatings were prepared by direct growth on different flexible polyimide substrates including a thin membrane and electrospun nanofiber mat. In SEM pictures, the ZIF-8 crystals exhibit a rhombic dodecahedron morphology. Owing to the flexible polyimide substrate, the MOF-polymer film may be moderately bent or easily tailored when not destroyed. The ZIF-8 coatings can be activated at high temperature owing to the excellent thermal resistance and low coefficient of thermal expansion of the polyimide. Furthermore, this material may be used as an efficient heterogeneous catalyst for the Knoevenagel reaction and can be easily recovered. The ZIF-8 coatings and 2-methylimidazole show similar catalytic behaviour as a weak base.

ε-poly-lysine (ε-PL) is a naturally-occurring homopolymer produced by the fermentation process. Here, we report a new chemical strategy based on ring opening polymerization to obtain ε-PL from lysine.

A novel low density two-fold interpenetrated MOF-5 analogue with pcu topology, JUC-100, was designed and prepared successfully. It can be regarded as MOF-5 in which half of the Zn(4)O(CO(2))(6) units are replaced by organic 1,3,5-triphenylbenzene segments. JUC-100 exhibits H(2) uptake ability comparable to interpenetrated MOF-5, but relatively low initial isosteric heat of adsorption.

A novel class of chiral coordination polymer organogels, with multi-stimuli responsive properties and suitable for use as catalysts in 1,3-dipolar Huisgen cycloaddition reaction, are reported.

Two non-interpenetrated and isomorphous MOFs with nia topology, cationic JUC-101 and anionic JUC-102, are synthesized by connecting a trigonal prismatic metal cluster with an octahedral organic ligand. JUC-101 obtains a BET surface area of 3742 m(2) g(-1) and can absorb 4.18 wt% of H2 at 30 atm and 77 K, while JUC-102 can absorb cationic dye molecules and release them under the triggering of ions.

opportunities, including facile separation and circulation of catalyst, easy purification of product, and continuous or multiple operations to address the tremendous requirements encountered in homogeneous catalysis. [7] One important characteristic is the confinement effect originating from the rigid cavity/channel of the solid platform. [8] In essence, as the pore size is adjusted to a reasonable range, the specific interaction between concave surface and substrate induces the subtle change of transition states and exerts great influence on the enantioselectivity in chiral synthesis. [9,10] It has been shown that some classical porous skeletons, such as inorganic solids (zeolites) and inorganic-organic hybrid solids (MOFs) have revealed a considerable substrate confinement effect. [11] However, the high proportion of inorganic constituents strongly disrupts the aromaticity of phenyl molecules due to the limitation of orbital spatial extension induced by the proximity of the pore walls. [12,13] The relatively low affinity results in an inadequate enantioselectivity for asymmetric catalysis, which cannot satisfy the strict standards for pure chiral substances put forth by the U.S. Food and Drug Administration. [12][13][14][15] As a novel type of crystalline solid, porous organic frameworks (POFs) have attracted a great deal of attention due to their promising applications in the fields of gas adsorption, [16] molecule separation, [17,18] optoelectronics, [19][20][21] etc. [22][23][24][25][26] In particular, POFs have shown great potential to serve as catalyst scaffolds due to their especially catalysis-friendly features, such as high permanent porosity, well-defined channels, and tuneable surfaces. [27][28][29][30][31][32][33] Their high proportions of conjugated components differ from the conventional porous matrices and will create specific affinities, such as hydrogen-π and π-π interactions for organic substances. Accordingly, the special confining reaction fields generated by POF channels may provide a new confinement effect for high-performance in asymmetric catalysis (Scheme 1).Herein, four 2D POF materials were synthesized with the same geometry and composition but with different pore diameters within the range of 1.2-2.9 nm by tuning the length of linkers (Figure 1). Through a facile post-modification, a chiralThe asymmetric hydrogenation of biomass-derived molecules for the preparation of single enantiomer compounds is an effective method to reduce the rapid consumption of fossil resources. Porous organic frameworks (POFs) with pure organic surfaces may provide unusual confinement effects for organic substrates in chiral catalysis. Here, a series of POF catalysts are designed with chiral active centers decorated into sharply defined onedimensional channels with diameters in the range of 1.2-2.9 nm. Due to the synergistic effect originating from the conjugated inner wall, the POF material (aperture size 2.4 nm) concentrates over 90% of aromatic species into the porous architecture, and its affinity is one...