999 resultados para GD-3
Resumo:
The speciation and distribution of Gd(III) in human interstitial fluid was studied by computer simulation. The results show that at the background concentration, all the Gd(III) species are soluble and no precipitates appear. However as the total concentration of Gd(III) rises above 2.610 x 10(-9) mol/l the insoluble species become predominant. GdPO4 is formed first as a precipitate and then Gd-2(CO3)(3). Among soluble species, free Gd(III), [Gd(HSA)], [Gd(Ox)] and the ternary complexes of Gd(III) with citrate as the primary ligand are main species when the total concentration of Gd(III) is below 2.074 x 10(-2) mol/l. With the total concentration of Gd(III) further rising, [Gd-3(OH)(4)] begins to appear and gradually becomes a predominant species.
Resumo:
The speciation and distribution of Gd(III) in human interstitial fluid was studied by computer simulation. Meantime artificial neural network was applied to the estimation of log beta values of complexes. The results show that the precipitate species, GdPO4 and Gd-2(CO3)(3), are the predominant species. Among soluble species, the free Gd(III), [Gd(HSA)], [Gd(Ox)] and then the ternary complexes of Gd(III) with citrate arc main species and [Gd-3(OH)(4)] becomes the predominant species at the Gd(III) total concentration or 2.2x10(-2)mol/L.
Resumo:
La_4(P_2O_7)_3;Ce,Gd,Tb.X,La_4(P_2O_7)_3Ce~(3+),Ce~(3+)Gd~(3+),,(La_(0.64)Ce_(0.3)Gd_(0.06)_4(P_2O_7)_3(La_(0.7)Ce_(0.3)_4(P_2O_7)3(La_(0.94)Gd_(0.06)_4(P_2O_7)_3.,Ce~(3+)Tb~(3+)~9,Tb~(3+).,Gd~(3+)Tb~(3+),(La_(0.80)Gd_(0.06)Tb_(0.14)_4(P_2O_7)_3(La_(0.86)Tb_(0.14)_4(P_2O_7)3.Ce,GdTb,Gd~(3+),Tb~(3+),
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60ABO_380 SrivastavaGdBO_3pr~(3+)Gd~(3+)Pr~(3+),
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The compounds, K_5LnLi_2F_(10)(Ln=La, Gd, Y) were synthesized by solid-state reaction in argon atmosphere. Powder X-ray diffraction patterns showed that K_5LnLi_2F_(10) is isostructural with K_5NdLi_2F_(10)(KNLF) except K_5YLi_2F_(10). The cell parameters and volumes of K_5LnLi_2F_(10)(Ln=La, Ce, Gd) were calculated. They decrease regularly with radii of La~(3+), Ce~(3+) and Gd~(3+). The excitation and fluorescent spactra of K_5Ce_xLn_(1-x) Li_2F_(10) were determined. It was found that the excitat...
Resumo:
(Ce,Gd,Mn)MgB_5O_(10)X,LaMgB_5O_(10),P2_(1/c)EPR(Ce_(0.2)La_(0.2))MgB_5O_(10),(Gd_(0.7)La_(0.3))MgB_5O_(10),(Mn_(0.05)La_(0.95))MgB_5O_(10),(Ce_(0.2)Mn_(0.05)La_(0.75))MgB_5O_(10),(Gd_(0.95)Mn_(0.05))MgB_5O_(10)(Ce_(0.2)Gd_(0.8))MgB_5O_(10)(Ce_(0.2)Gd_(0.75)Mn_(0.05))MgB_5O_(15)(Ce_(0.2)Gd_(0.75)Mn_(0.05))MgB_5O_(10):Ce~(3+)Mn~(2+),Gd~(3+)Mn~(2+)Ce~(3+)Gd~(3+)Mn~(2+),Ce~(...
Resumo:
GdP_5O0_(14):Sm~(3+)(GdPP:Sin)Sm~(3+)4~G_5/2~6H_7/2(594nm), Sm~(3+)Sm~(3+)Sm~(3+) Gd~(3+)Sm~(3+) Sm~(3+)Sm~(3+) GdPP Sm~(3+)
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Conselho Nacional de Desenvolvimento Cientfico e Tecnolgico (CNPq)
Resumo:
Lanthanide coordination polymers of the general formula Ln(2)(L)(5)(NO3)(H2O)(4)](n) (Ln = Eu (1), Tb (2), Gd (3)) supported by a novel aromatic carboxylate ligand 4-((1H-benzod]imidazol-1-yl)methyl)benzoic acid (HL) have been synthesized, characterized, and their photoluminescence behavior is examined. The powder X-ray diffraction patterns of complexes 1-3 showed that 1-3 are isostructural; thus, 1 has been chosen as an example to discuss in detail about the molecular structure by single-crystal X-ray diffraction. Complex 1 is a one-dimensional (1D) helical chain-like coordination polymer consisting of unique unsymmetrical dinuclear lanthanide building blocks. The 1D chains are further linked by the significant intermolecular hydrogen-bonding interactions to form a two-dimensional supramolecular network. The Tb3+ complex exhibits bright green luminescence efficiency in the solid state with a quantum yield of 15%. On the other hand, poor luminescence efficiency has been noted for Eu3+-benzoate complex.
Resumo:
1 Pr~(3+)Gd~(3+)Tb~(3+)Yb~(3+)Ca~(2+)Zn~(2+)-----(111111121113)11122. 1COMICSpH2AZn(II)Tb(111)pHTb(III)Zn(II)Tb(III)Zn(II)Tb(III)Zn(II)3Tb(III)Ca(11)Tb(III)Ca(11)1E-4mol/L
Resumo:
750 4hMAl_2O_4:Eu~(2+), RE~(3+) M = Mg, Ca, Sr, Ba; RE = Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, LuPr, Nd, Dy, Ho, ErMAl_2O_4:Eu~(2+)MAl_2O_4:Eu~(2+)Dy, EuMgl_2O_4:Eu~(2+)RE~(3+)Ca Al_2O_4:Eu~(2+)RE~(3+)SrAl_2O_4:Eu~(2+)RE~(3+)Ba Al_2O_4:Eu~(2+), RE~(3+)Mg Al_2O_4:Eu~(2+)RE~(3+) Ba Al_2O_4:Eu~(2+), RE~(3+)480nm, 500nm, Ca Al_2O_4:Eu~(2+), RE~(3+) (436 nm) SrAl_2O_4:Eu~(2+)RE~(3+) (520 nm) Ca Al_2O_4:Eu~(2+)RE~(3+)SrAl_2O_4:Eu~(2+)RE~(3+)Ca Al_2O_4:Eu~(2+)RE~(3+)SrAl_2O_4:Eu~(2+)RE~(3+)MA:Eu~(2+)RE~(3+)489nmMA:Eu~(2+)RE~(3+)SrAl_2O_4:Eu~(2+)RE~(3+)489nm520 nmSrGdAlO_4:RE~(3+) RE = Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, LuSrGdAlO_4:RE~(3+) RE = Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, ErTm, Yb, Lu SrGdAlO_4:RE~(3+) Gd~(3+) Gd~(3+)Gd~(3+) RE~(3+)RE~(3+)Gd~(3+) Eu Tb Er Dy Sm Ho NdSrGdAlO_4:Tb~(3+)
Resumo:
Ca_4RO(BO_3)_3(R:)1PbO, PbF_2B_2O_3Gd_2O_3, CaCO_3, H_3BO_3GdCOB2 Ca_4GdO(BO_3)_3: Eu~(3+),Sm~(3+)Ca_4GdO(BO_3)_3Eu~(3+) 611nmGd~(3+)Gd~(3+)-Gd~(3+)Eu~(3+)Sm~(3+)Eu~(3+)3 M_4LnO(BO_3)_3: Dy~(3+)(M=Ca, Sr, Ba;Ln=La, Gd, Y, Yb, Lu)Dy~(3+)Dy~(3+)Ca~(2+)Sr~(2+)Ba~(2+)La~(3+)Gd~(3+)Yb~(3+)Lu~(3+), Dy~(3+)~4F_(9/2)~6H_(13/2)4 Ca_4YO(BO_3)_3:Tb~(3+), Ce~(3+)Tb~(3+)Ce~(3+)Tb~(3+)Ce~(3+)Tb~(3+)
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KMgF_3:Eu~(2+)KMgF_3:Eu~(2+)-X(X=Gd~(3+)Ce~(3+)Cr~(3+)Cu~(+))12UV-Vis300 K77 KEu~(2+)4Eu~(2+) ~6P_(7/2)Eu~(2+)Ce~(3+)d-dKMgF_3:Eu~(2+)
Resumo:
PDP-PDPPDPPDP- PDPPDPPDPYGdBO_3LaGdPO4YGdVO4YPVO_4LoBSIOSXRDIRSEMXPSTG-DTAPDPVUV1Y,GdBO_3RE~(3+)REEuThVUVsEM100-200nmXPSY,GdBO_3RE~(3+)VUV110-175nmB3G"B-OGGY,GdBO3:RE3Gd3RE3PDPEu3Th3GdB03Y,GdBO3Eu~(3+)2GPDPL aGdPo4RE3REEuTb2HPO4pH5240oC3SEMLaP04Eu3+GdPO4Eu3+Gd3LaGdPO4KE3RE=EuTbVUVGd3Gd3Gd3LaGdPO4Eu3+Gd3Eu3+xPsLaPO4GdP04LaP04O22PGdPo4O2-2pGd34fLaGdPO4RE3VUV3Y,GdVO4Eu3+VUV120-170nmvO43200nm2PO4fY5d20onmEu3VO43-Gd3YGdVO4E"vLJ'vGGd3vo43+Eu3+Y,GdVO4Eu3+Y,Gdvo4EusVO_4~(3-)Eu~(3+)VO_4~(3-)vuvGd~(3+)VO_4~(3-)UVEu~(3+)Gd34YPvO4Eu3"pH12.52406YPVo4Eu3XRDSEMYPVO4Eu3VO3-4YPO4Eu3+100-150nmYVO4Eu3+400-450nmYP VO4:Eu3+VUVEu3+VO3-4~5D_0~7F_2~5D_0~7F_1VO_4~(3-_VO4YPVO4Eus"VUVYP,VO4Eu35LaBSIOSSEM2-3mLaBSiO_5Eu~(3+)1300-400cm~(-1)BO_4SiO_4LaBSiO_5:Re~(3+)RE=EuSmThvuvVUV125-200nmBO_4125-165nmSiO4165-183nmLaBSiO_5RE~(3+)REEuSmTb254nm
Resumo:
cyanex272CA-100CA-12Y,Er,Sc2EHEHPACyanex923LaNdGd3CA-100Y4CA-100Cyonex272Y,YbY,YbYbY,Yb5CA-100+Cyanex272-
