Aminoclay decorated with lanthanide complexes and carbon dots:Tunable emission and information encryption

Herein we present emission color-tunable and multi-functional lanthanide(Ⅲ)luminescent hybrid materials(Ln(DPA)@AC-CDs)by mixing aminoclay(AC),2,6-pyridinedicarboxylic acid(DPA),Ln3+(Ln=Eu,Tb or Eu and Tb in different molar ratios),and carbon dots(N,S-CDs)in water,showing high quantum yields up to 58.8%.The emission colors can be finely tuned by altering the excitation wavelength and the amounts of the components,and white light emission(CIE-(0.27,0.25))can be achieved for sample Eu1Tb2(DPA)@AC-CDs under 325 nm light irradiation.In addition,under 365 nm UV light excitation,the Eu(DPA)@AC-CDs powder exhibits red luminescence due to the sensitization effect of N,S-CDs on Eu^3+,which turns to bright blue when the powder is dispersed in water attributed to the high dispersion of the aggregated N,S-CDs particles.These luminescent properties afford Ln(DPA)@AC-CDs potential candidates for designing optoelectronic devices like WLEDs or in information encryption applications.

Herein we present emission color-tunable and multi-functional lanthanide（III） luminescent hybrid materials（Ln（DPA）@AC-CDs） by mixing aminoclay（AC）, 2,6-pyridinedicarboxylic acid（DPA）, Ln3+（Ln = Eu,Tb or Eu and Tb in different molar ratios）, and carbon dots（N,S-CDs） in water, showing high quantum yields up to 58.8%. The emission colors can be finely tuned by altering the excitation wavelength and the amounts of the components, and white light emission（CIE-（0.27, 0.25）） can be achieved for sample Eu1Tb2（DPA）@AC-CDs under 325 nm light irradiation. In addition, under 365 nm UV light excitation, the Eu（DPA）@AC-CDs powder exhibits red luminescence due to the sensitization effect of N,S-CDs on Eu3+,which turns to bright blue when the powder is dispersed in water attributed to the high dispersion of the aggregated N,S-CDs particles. These luminescent properties afford Ln（DPA）@AC-CDs potential candidates for designing optoelectronic devices like WLEDs or in information encryption applications.