New hybrids combined metalloviologens with Ag/Cu iodides exhibit reversible thermochromisms, photocurrent responses, whose mechanisms are disclosed.

Six new squarate-based complexes with 3-D networks, 2-D layers and 0-D clusters have been prepared. 5 and 6 feature the first examples of incorporating squarate with viologens in one lattice, which exhibit not only photocurrent responses but also reversible thermochromisms.

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A combination of N-arylstilbazolium organic nonlinear optical chromophores with iodoargentates results in five new hybrids, i.e., [(DAST)­(Ag2I3)] n (1), [(DMAQS)­(Ag2I3)] n (2), [(DPAS)­(Ag2I3)] n (3), [(DPTAS)2­(Ag5I7)] n (4), and [(CEMAS)2­(Ag5I7)] n (5). Among them, the former four are centrosymmetric, and 5 is non-centrosymmetrical (space group Pna21) with the introduction of a cyano group in an organic chromophore. The (Ag5I7) n 2n– chains in 4 and 5 are special, in which that of 4 is constructed from Ag5I10 building blocks with a μ6-I σ-bonding to six Ag ions, and that in 5 is the connection of a cubane-like Ag4I4 core with bridged AgI4 tetrahedra. UV/vis/near-IR adsorptions and near-IR photoluminescences have been observed. All the organic chromophores are stacked as head-to-tail arrangements, resulting in second harmonic generation (SHG) inactive in 1–4. But 5 is SHG active without J-aggregation of organic chromophore, whose symmetry break was driven by the formation of hydrogen bonds around the cyano group. The SHG activity of 5 originates from the polarizations of the asymmetric contribution of Ag5I9 4– unit mixing with non-centrosymmetrical (CEMAS)2 2+ pair. Theoretical calculations were carried out to disclose their electronic structures.

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The real GDP (or constant-price GDP) eliminates price fluctuation, which makes it easier to compare the changes of production, business activities, and economic scale and growth between different periods. China's real GDP accounting adopts the index deflation method, but the representativeness, accuracy, international and vertical comparability of the price indices need to be further improved. This paper suggests that China's real GDP accounting system should be in line with the international standard as soon as possible and adopt the chain price index recommended by NSA2008, so as to standardize the statistical work, reduce potential deviations and omissions, and improve the quality of statistics.

Considering that many real networks do not have strict self-similarity property, compared with deterministic evolutionary fractal networks, networks with random sequence structure may be more in accordance with the properties of real networks. In this paper, we generate a hierarchical network by a random sequence based on BRV model. Using the encoding method, we present a way to judge whether two nodes are neighbors and calculate the total path length of the network. We get the degree distribution and limit formula of the average path length of a class of networks, which are obtained by analytical method and iterative calculation.