A Two-dimensional Lanthanide Coordination Framework with a New Amide-type Tripodal Ligand, 2,2′,2＂-Nitrilotris{[（2′- benzylaminoformyl）phenoxy]ethyl}amine

The La(III) complex with a new amide‐type tripodal ligand,2,2′.2″‐nitrilotris{[(2′‐benzylaminofomyl)‐phenoxylethyl)amine (L), was synthesized and characterized by X‐ray crystallographic analysis. Crystal data: C₄₈H_55.50LaN₇O_18.75, M_r=1169.40, monoclinic. space group, P2₁/n, a= 1.0644(3) nm. b=2.3889(5) nm, c= 2.1917(5) nm, β=90.65°, V=5.573(2) nm³, Z=1, D_c=1.394 g°cm^?3, R₁=0.0487, wR [1>2s?(I)]=0.1266. The results reveal that each La(III) ion binds to 9 oxygen atoms, three of which belong to carbonyl groups from three tripodal ligands and six to three bidentate nitrate groups and a two‐dimensional sheet of 4.8² networks is assembled by metal‐ligand coordination interaction. L, a heptadentate compound, merely acts as a tridentate bridging spacer due to its steric hindrance and links the La(III) ions as three‐connected nodes.     

The influence of ions on the structure of water

Journal of Structural Chemistry - The main features of the changes produced by ions in water may be summarized as follows. The influence of ions on the structure of the “free” water...     

明胶包埋黑根霉菌丝体对水中Pb^2＋吸附性能的研究

本文研究了明胶包埋黑根霉菌丝体的包埋条件及包埋后对水中Ｐｂ~（２＋）的吸附作用。结果表明，包埋比例为６／１（Ｗ／Ｗ），交联剂甲醛用量为２５％，凝胶化温度为４０℃，ＰＨ＝１０．０为包埋反应的最佳条件。包埋后的饱和吸附量可达１２１．２ｍｇ／ｇ，比未包埋黑根霉下降１０．８％。吸附平衡时间延长至８００分钟。ｐＨ值对吸附量有较大影响，ＰＨ＝４．０时，吸附最佳。升高温度有利于吸附。流速对动态吸附有很大影响。ＨＮＯ３和ＮａＯＨ可以对吸附剂进行解吸与再生，解吸率在９４％以上。明胶包埋后黑根霉具有较好的物理性能，断裂压缩强度为１２８．１Ｎ／ｃｍ２。     

Influence of alkali metal and ammonium cations on the structure of iron(II) and cobalt(III) hexacyanide complexes encapsulated in faujasite

Changing the cation composition (Na⁺ to K⁺, NH₄ ⁺ Cs⁺) of faujasite with hexacyanoferrate(II) encapsulated in the large pores causes distortion of the octahedral symmetry of the complex.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 30, No. 5, pp. 293–297, September–October, 1994.