Six new lanthanide complexes:[Ln(3,4-DEOBA)3(4,4'-DM-2,2'-bipy)]2·2C_(2)H_(5)OH,[Ln=Dy(1),Eu(2),Tb(3),Sm(4),Ho(5),Gd(6);3,4-DEOBA-=3,4-diethoxybenzoate,4,4'-DM-2,2'-bipy=4,4'-dimethyl-2,2'...Six new lanthanide complexes:[Ln(3,4-DEOBA)3(4,4'-DM-2,2'-bipy)]2·2C_(2)H_(5)OH,[Ln=Dy(1),Eu(2),Tb(3),Sm(4),Ho(5),Gd(6);3,4-DEOBA-=3,4-diethoxybenzoate,4,4'-DM-2,2'-bipy=4,4'-dimethyl-2,2'-bipyridine]were successfully synthesized by the volatilization of the solution at room temperature.The crystal structures of six complexes were determined by single-crystal X-ray diffraction technology.The results showed that the complexes all have a binuclear structure,and the structures contain free ethanol molecules.Moreover,the coordination number of the central metal of each structural unit is eight.Adjacent structural units interact with each other through hydrogen bonds and further expand to form 1D chain-like and 2D planar structures.After conducting a systematic study on the luminescence properties of complexes 1-4,their emission and excitation spectra were obtained.Experimental results indicated that the fluorescence lifetimes of complexes 2 and 3 were 0.807 and 0.845 ms,respectively.The emission spectral data of complexes 1-4 were imported into the CIE chromaticity coordinate system,and their corre sponding luminescent regions cover the yellow light,red light,green light,and orange-red light bands,respectively.Within the temperature range of 299.15-1300 K,the thermal decomposition processes of the six complexes were comprehensively analyzed by using TG-DSC/FTIR/MS technology.The hypothesis of the gradual loss of ligand groups during the decomposition process was verified by detecting the escaped gas,3D infrared spectroscopy,and ion fragment information detected by mass spectrometry.The specific decomposition path is as follows:firstly,free ethanol molecules and neutral ligands are removed,and finally,acidic ligands are released;the final product is the corresponding metal oxide.CCDC:2430420,1;2430422,2;2430419,3;2430424,4;2430421,5;2430423,6.展开更多
Luminescence thermometry has attracted more and more attention due to its non-contact and noninvasive operation,fast response,high spatial resolution,and so on,for which the luminescent thermometers are the key.Here,a...Luminescence thermometry has attracted more and more attention due to its non-contact and noninvasive operation,fast response,high spatial resolution,and so on,for which the luminescent thermometers are the key.Here,a 1D complex[Tb_(4)(HTC4A)(TC4A)(OBBA)_(2)(CH_(3)OH)_(4)(μ4-OH)]n(1)was obtained by solvothermal synthesis,where H 4TC4A=p-tert-butylthiacalix[4]arene,and H_(2)OBBA=4,4'-oxybisbenzoic acid.This complex is featured with a chain-like polymer constructed by bridging some sandwich-like Tb_(4)-(TC4A)_(2)entities through OBBA2-ligands.It exhibited the characteristic emission of the Tb^(3+)ion.Both fluorescence intensity and lifetime decreased with increasing temperature.The relative sensitivity was up to 8.743%·K^(-1)at 473 K,indicating it is a good ratiometric luminescent thermometer.This complex had good stability under different pH values and in common solvents.CCDC:2392643.展开更多
A binuclear terbium complex with 2,4,6-Trimethylbenzoate and 1,10-phenanthroline,[Tb2(TMBA)6(Phen)2],has been synthesized(TMBA=2,4,6-Trimethylbenzoic acid and phen=1,10-phenanthroline)and characterized by IR,elemental...A binuclear terbium complex with 2,4,6-Trimethylbenzoate and 1,10-phenanthroline,[Tb2(TMBA)6(Phen)2],has been synthesized(TMBA=2,4,6-Trimethylbenzoic acid and phen=1,10-phenanthroline)and characterized by IR,elemental analysis and X-ray diffraction methods.The title complex crystallizes in monoclinic system,space group P21 /c with a=1.327 5(2)nm,b=2.817 9(5)nm,c=1.282 5(2)nm,β=116.692(3)°,V=4.286 2(13)nm3,Z=4,Dc=1.423 g·cm-3.There are four bridged carboxylate groups of the 2,4,6-trimethylbenzoic acid bonded to the two terbium ions,each ions is also chelated with the two oxygen atoms of a molecule of the 2,4,6-trimethylbenzoic acid and the two nitrogen atoms of a 1,10-phenanthroline respectively,forming a 8-coordination distorted square antiprism.Average Tb-O and Tb-Ndistance of the two Tb(Ⅲ)ions are equal respectively.This shows the two terbium ions are in the same chemical enviorments.The complex emits intense green fluorescence under ultraviolet light.CCDC:619215.展开更多
A novel one-dimensional chain coordination polymer of terbium(Ⅲ)with p-methylbenzoic acid,2,2’-bi-pyridine and 4,4’-bipyridine has been synthesized and characterized.The crystal data of this complex C39H37N3O8Tb ar...A novel one-dimensional chain coordination polymer of terbium(Ⅲ)with p-methylbenzoic acid,2,2’-bi-pyridine and 4,4’-bipyridine has been synthesized and characterized.The crystal data of this complex C39H37N3O8Tb are as follows:monoclinic system,space group P21 /n,a=0.974 01(10)nm,b=2.605 8(3)nm,c=1.457 77(14)nm,β=96.108(2)°,V=3.678 9(6)nm3,Dc=1.507 g·cm-3,Mr=834.64,Z=4,μ(Mo Kα)=1.978 mm-1,F(000)=1 684,R1=0.032 4,wR2=0.063 4.The crystal structure of the complex shows that the terbium(Ⅲ)ion is coordinated with eight oxygen atoms,six from five p-methylbenzoic acid molecules and two from two water molecules,respectively,forming the distorted tetraprism geometry.The luminescent property of the complex is also studied.CCDC:619216.展开更多
文摘Six new lanthanide complexes:[Ln(3,4-DEOBA)3(4,4'-DM-2,2'-bipy)]2·2C_(2)H_(5)OH,[Ln=Dy(1),Eu(2),Tb(3),Sm(4),Ho(5),Gd(6);3,4-DEOBA-=3,4-diethoxybenzoate,4,4'-DM-2,2'-bipy=4,4'-dimethyl-2,2'-bipyridine]were successfully synthesized by the volatilization of the solution at room temperature.The crystal structures of six complexes were determined by single-crystal X-ray diffraction technology.The results showed that the complexes all have a binuclear structure,and the structures contain free ethanol molecules.Moreover,the coordination number of the central metal of each structural unit is eight.Adjacent structural units interact with each other through hydrogen bonds and further expand to form 1D chain-like and 2D planar structures.After conducting a systematic study on the luminescence properties of complexes 1-4,their emission and excitation spectra were obtained.Experimental results indicated that the fluorescence lifetimes of complexes 2 and 3 were 0.807 and 0.845 ms,respectively.The emission spectral data of complexes 1-4 were imported into the CIE chromaticity coordinate system,and their corre sponding luminescent regions cover the yellow light,red light,green light,and orange-red light bands,respectively.Within the temperature range of 299.15-1300 K,the thermal decomposition processes of the six complexes were comprehensively analyzed by using TG-DSC/FTIR/MS technology.The hypothesis of the gradual loss of ligand groups during the decomposition process was verified by detecting the escaped gas,3D infrared spectroscopy,and ion fragment information detected by mass spectrometry.The specific decomposition path is as follows:firstly,free ethanol molecules and neutral ligands are removed,and finally,acidic ligands are released;the final product is the corresponding metal oxide.CCDC:2430420,1;2430422,2;2430419,3;2430424,4;2430421,5;2430423,6.
文摘Luminescence thermometry has attracted more and more attention due to its non-contact and noninvasive operation,fast response,high spatial resolution,and so on,for which the luminescent thermometers are the key.Here,a 1D complex[Tb_(4)(HTC4A)(TC4A)(OBBA)_(2)(CH_(3)OH)_(4)(μ4-OH)]n(1)was obtained by solvothermal synthesis,where H 4TC4A=p-tert-butylthiacalix[4]arene,and H_(2)OBBA=4,4'-oxybisbenzoic acid.This complex is featured with a chain-like polymer constructed by bridging some sandwich-like Tb_(4)-(TC4A)_(2)entities through OBBA2-ligands.It exhibited the characteristic emission of the Tb^(3+)ion.Both fluorescence intensity and lifetime decreased with increasing temperature.The relative sensitivity was up to 8.743%·K^(-1)at 473 K,indicating it is a good ratiometric luminescent thermometer.This complex had good stability under different pH values and in common solvents.CCDC:2392643.
文摘A binuclear terbium complex with 2,4,6-Trimethylbenzoate and 1,10-phenanthroline,[Tb2(TMBA)6(Phen)2],has been synthesized(TMBA=2,4,6-Trimethylbenzoic acid and phen=1,10-phenanthroline)and characterized by IR,elemental analysis and X-ray diffraction methods.The title complex crystallizes in monoclinic system,space group P21 /c with a=1.327 5(2)nm,b=2.817 9(5)nm,c=1.282 5(2)nm,β=116.692(3)°,V=4.286 2(13)nm3,Z=4,Dc=1.423 g·cm-3.There are four bridged carboxylate groups of the 2,4,6-trimethylbenzoic acid bonded to the two terbium ions,each ions is also chelated with the two oxygen atoms of a molecule of the 2,4,6-trimethylbenzoic acid and the two nitrogen atoms of a 1,10-phenanthroline respectively,forming a 8-coordination distorted square antiprism.Average Tb-O and Tb-Ndistance of the two Tb(Ⅲ)ions are equal respectively.This shows the two terbium ions are in the same chemical enviorments.The complex emits intense green fluorescence under ultraviolet light.CCDC:619215.
文摘A novel one-dimensional chain coordination polymer of terbium(Ⅲ)with p-methylbenzoic acid,2,2’-bi-pyridine and 4,4’-bipyridine has been synthesized and characterized.The crystal data of this complex C39H37N3O8Tb are as follows:monoclinic system,space group P21 /n,a=0.974 01(10)nm,b=2.605 8(3)nm,c=1.457 77(14)nm,β=96.108(2)°,V=3.678 9(6)nm3,Dc=1.507 g·cm-3,Mr=834.64,Z=4,μ(Mo Kα)=1.978 mm-1,F(000)=1 684,R1=0.032 4,wR2=0.063 4.The crystal structure of the complex shows that the terbium(Ⅲ)ion is coordinated with eight oxygen atoms,six from five p-methylbenzoic acid molecules and two from two water molecules,respectively,forming the distorted tetraprism geometry.The luminescent property of the complex is also studied.CCDC:619216.
