Synthesis And Optical Properties Of Rare Earth Complexes Based On 2 - Aldehyde - 8 - Hydroxyquinoline

As multidentate ligands, 8-hydroxyquinoline derivants could be easily functionalized through the incorporation of proper moieties. In this thesis, we have obtained 20 lanthanide crystals through the self-assembly of 2-aldehyde-8-hydroxyquinoline with tris or histamine. And they have been characterized by IR, UV, TG, CHN and single crystal analysis etc. The complexes as known as: Ce(baho)2·Et2O(1)(H2baho = 2,8-bis(2-(8-hydroxyl-quinolinyl))-1-aza-5-hydroxymethyl-3,7-dioxabicyclo[3.3.0]octa ne), Dy(nhm)2Cl·0.5H2O(2),Ln(nhm)2Cl·0.5C6H14 [Ln = Ho(3), Er(4), Yb(5)](Hnhm = N-(2-(8-hydroxylquinolinyl)methylene)(trishydroxymethyl)methylamine)),Nd3(nma)2(OAc)7·2.5CH3OH·0.5H2O(6), Ln3(nma)2(OAc)7·2H2O [Ln = Tb(7), Dy(8), Yb(9)], Ln(nma)(NO3)2CH3OH·C4H10 [Ln = Tb(10), Dy(11)], Ln(nma)(NO3)2DMSO· CH3 OH [Ln = Nd(12), Tb(13), Dy(14), Ho(15), Er(16), Yb(17)], Ln(nma)2(ClO4)· 0.5CH3 OH [Ln = Tb(18), Dy(19), Yb(20)](Hnma = N-(2-(8-hydroxylquinolinyl)meth ane(2-(4-imidazolyl)ethanamine)). Meanwhile, NIR fluorescence behaviors of 5, 9, 17, 20 have been studied and the quantum yields are measured as well. The magnetic properties of 8, 11, 14, 19 are investigated.Results have revealed that anions have played significant role to the as synthesized product indicating the structured variation of lanthanides. It is noted that distinct NIR and magnetic properties are found, although distinct only subtle geometric difference is detected for lanthanide polyhedral. We believe this work would provide an insight into the self-assembly process that would guide the potential application.