| Borax(Na2B4O7·10H2O),as an important chemical raw material,is widely used in daily production and life.As B4O72-has larger toxicity,it is very important to develop an efficient and convenient method for the detection of B4O72-.Firstly,we designed and synthesized a novel Salamo-like compound H2L1 with 3-tert-butylsalicylaldehyde as the precursor.The compound can recognize B4O72-ion in dual-channel with a low detection limit of 4.27×10-12M.In addition,the B4O72-ion can be recognized by naked eye,it can be made into portable test paper to detect B4O72-ion.With the help of"Color Assist"software,colorimetric analysis can be carried out to realize the detection of B4O72-ion.It is found that the compound has a good recovery rate and a good application prospect by testing the water samples from the source and the deionized water.Coordination polymers and metal-organic frameworks(MOFs)have attracted more and more attention due to their large porosity and regular pores.The pyridine group was introduced at the 5-position of 3-tert-butylsalicylaldehyde and reacted with1,2-diaminooxyethane,a structurely novel Salamo-like ligand H2L2 containing terminal pyridine was obtain.Firstly,we obtained the single crystals of H2L2,which directly proved its structure.Then the ligand H2L2 coordinated with different transition metal(II)ions(Cu(II),Zn(II),Co(II)and Ni(II))to obtain 4 new complexes(the complexes 1-4).Among them,the complex 2 is a coordination polymer,the complexes 3 and 4 are metal-organic frameworks.In previous studies of Salamo-like metal complexes,there are few reports on the construction of metal-organic frameworks.In this article,two novel Salamo-like MOFs(the complex 3 and 4)are constructed and reported for the first time.Inspired by the coordination of the terminal pyridine nitrogen atom of the ligand H2L2,part of the solution was replaced with pyridine during single crystal culture,and obtained the Ni(II)complex(the complex 5)without the ligand H2L2 involved in the coordination.When the ligand H2L2 is coordinated with the Cd(II)ion and supplemented with different auxiliary ligands to obtain 3 coordination polymers(the complexes 6-8)with different structures.The structures and properties of the above 9obtained single crystals were studied in detail,and the thermal stabilities of some of the complexes was analyzed.In terms of fluorescent properties,it was found that complexes 2and 8 have good fluorescent properties and could emit bright green fluorescence under 365nm UV lamp.In addition,Hirshfeld surfaces analyses were used to calculate the interaction forces in the ligand and the complexes.The H2L2 single crystal:C34H38N4O4,molecular weight:566.68,space group:P21/C,CCDC-1957216.The complex 1:[Cu(L2H)]NO3·Et OH(C36H37Cu N5O8),molecular weight:566.68,space group:P21/C,CCDC-2014472.The complex 2:[{Zn2(L2)(OAc)2}4]n·2n Et OH(C156H180N16O34Zn8),molecular weight:3346.11,space group:P121/C,CCDC-2019253.The complex 3:[{Co(L2)}2]n·n Ace(C71H78Co2N8O9),molecular weight:1305.27,space group:P43,CCDC-2014475.The complex 4:[{Ni(L2)}2]n·3n Py·n Ace(C76H83Ni2N9O9),molecular weight:1383.93,space group:P43,CCDC-2014473.The complex 5:[Ni(Py)4(NCS)2](C22H20Ni N6S2),molecular weight:491.27,space group:C2/C,CCDC-2009393.The complex 6:[Cd(H2L2)(OAc)2]n(C38H44Cd N4O8),molecular weight:797.17,space group:P-1,CCDC-2014474.The complex 7:[Cd(H2L2)2(NCS)2]n(C70H76Cd N10O8S2),molecular weight:1361.92,space group:P-1,CCDC-2019252.The complex 8:[{Cd(H2L2)(OAc-)((?)2-OAc-)Na(OAc-)(Me OH)(Et OH)}2]n(C81H101N8O20Cd2Na2),molecular weight:1777.47,space group:P-1,CCDC-2019254. |
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