Tunable luminescence and white light emission of mixed lanthanide–organic frameworks based on polycarboxylate ligands

2016 ◽  
Vol 4 (16) ◽  
pp. 3364-3374 ◽  
Author(s):  
Jiawei Wu ◽  
Huabin Zhang ◽  
Shaowu Du
Keyword(s):  
White Light ◽  
Light Emission ◽  
Relative Concentration ◽  
White Light Emission ◽  
Excitation Wavelength

This review highlights the luminescence tuning and white light emission of aromatic polycarboxylate-based mixed Ln-MOFs by changing the relative concentration of the constituent Ln3+ ions or the excitation wavelength.

Tunable luminescence and white light emission of porphyrin-zinc coordination assemblies

2018 ◽  
Vol 22 (09n10) ◽  
pp. 821-830 ◽  
Author(s):  
Zheng Wang ◽  
Jian-Hua Zhang ◽  
Cheng-Yi Zhu ◽  
Shao-Yun Yin ◽  
Mei Pan
Keyword(s):  
White Light ◽  
Light Emission ◽  
Three Dimensional ◽  
White Light Emission ◽  
Molar Ratio ◽  
Excitation Wavelength ◽  
Temperature Dependent ◽  
Long Wavelength ◽  
Linear Formula ◽  
Zinc Coordination

Bipodal ligand 5,15-bis(4-carboxyphenyl) porphyrin (H[Formula: see text]DCPP) was designed and synthesized. By adjusting the molar ratio of H[Formula: see text]DCPP, ancillary ligand 4,4-bipyridine (bpy) and zinc acetate salts, three novel coordination assemblies, namely, zero-dimensional dimeric [Zn[Formula: see text](H[Formula: see text]DCPP)[Formula: see text] ·bpy] ·4H[Formula: see text]O ·4DMF (Zn-D), two-dimensional polymeric {[Zn[Formula: see text](DCPP) ·bpy[Formula: see text] ·H[Formula: see text]O ·DMF[Formula: see text]] ·solvent}[Formula: see text] (Zn-2D), and three-dimensional polymeric [Zn[Formula: see text](DCPP) ·bpy[Formula: see text]][Formula: see text] (Zn-3D) were assembled. Due to the delicate integration of multiple chromophores in the coordination space combining bpy, DCPP and MLCT emissions together, photoluminescence (PL) of the three porphyrin-zinc coordination assemblies differ from each other and color tone is tunable from blue to orange with changes of the excitation wavelength. In particular, white light emission (WLE) can be observed by the excitation of 270 to 290 nm, representing the first examples of single component WLE compounds based on porphyrin ligands. Furthermore, temperature-dependent luminescence results in a linear [Formula: see text]–[Formula: see text] relationship in Zn-2D and Zn-3D assemblies, applicable for long wavelength red-emitting thermometers.

Dopant and excitation wavelength dependent color tunability in Dy3+:YVO4 and Dy3+/Eu3+:YVO4 microparticles towards white light emission

2016 ◽  
Vol 45 (41) ◽  
pp. 16231-16239 ◽  
Author(s):  
Anna M. Kaczmarek ◽  
Dorine Ndagsi ◽  
Rik Van Deun
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Emission Color ◽  
Color Tunability

The emission color of Dy:YVO4 and Dy,Eu:YVO4 microstructures could be tuned towards white light and white light with a yellow undertone through varying the Ln3+ doping percentages as well as the excitation wavelengths.

scholarly journals Secondary Through-Space Interactions: Achieving Single-Molecule White-Light Emission from Clusteroluminogens with Isolated Phenyl Rings

2022 ◽  
Author(s):  
Jianyu Zhang ◽  
Parvej Alam ◽  
Siwei Zhang ◽  
Hanchen Shen ◽  
Lianrui Hu ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
Photophysical Properties ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Conjugated Molecules ◽  
Long Wavelength ◽  
Phenyl Rings ◽  
Donor Acceptor

Clusteroluminogens (CLgens) refer to some non-conjugated molecules that show visible light due to the formation of aggregates and unique electronic properties with through-space interactions (TSI). Although mature and systematic theories of molecular photophysics have been developed to study conventional conjugated chromophores, it is still challenging to endow CLgens with designed photophysical properties by manipulating TSI. Herein, three CLgens with non-conjugated donor-acceptor structures and different halide substituents with secondary TSI are designed and synthesized. These molecules show multiple emissions and even white-light emission in the crystalline state and the intensity ratio of these multiple emission peaks is easily manipulated by changing the halide atom and excitation wavelength. Experimental and theoretical results successfully disclose the electronic nature of these multiple emissions: through-space conjugation for short-wavelength fluorescence, through-space charge transfer based on secondary TSI for long-wavelength fluorescence, and room-temperature phosphorescence. The introduction of secondary TSI to CLgens not only enriches their varieties of photophysical properties but also inspires the establishment of novel aggregate photophysics for clusteroluminescence.

White-light emission from a structurally simple hydrazone

2019 ◽  
Vol 55 (64) ◽  
pp. 9551-9554 ◽  
Author(s):  
Baihao Shao ◽  
Nell Stankewitz ◽  
Jacob A. Morris ◽  
Matthew D. Liptak ◽  
Ivan Aprahamian
Keyword(s):  
White Light ◽  
Light Emission ◽  
Fluorescence Emission ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Dual Fluorescence

Two hydrazones featuring a unique excitation wavelength-dependent dual fluorescence emission have been developed.

Influence of synthesis conditions on the morphologies of ReBO3 microstructures and white light emission of YBO3:Eu3+ phosphors prepared by an oleic acid-assisted hydrothermal method

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69442-69453 ◽  
Author(s):  
Baobao Liu ◽  
Xiuzhen Xiao ◽  
Jun Yu ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Oleic Acid ◽  
Hydrothermal Method ◽  
White Light ◽  
Light Emission ◽  
Dopant Concentration ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Synthesis Conditions ◽  
Light Color ◽  
The Eu

YBO3:5%Eu3+ phosphor prepared by the OA-assisted hydrothermal method displays the white color under excitation at 394 nm, and the light color of YBO3:Eu3+ can be varied with the Eu3+ dopant concentration or the excitation wavelength.

Color-tunable and white-light emission of one-dimensional l-di-2-thenoyltartaric acid mixed-lanthanide coordination polymers

2015 ◽  
Vol 44 (10) ◽  
pp. 4640-4647 ◽  
Author(s):  
Chang Feng ◽  
Jing-Wen Sun ◽  
Peng-Fei Yan ◽  
Yu-Xin Li ◽  
Tian-Qi Liu ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
One Dimensional ◽  
Lanthanide Coordination Polymers ◽  
Color Tunable

l-Di-2-thenoyltartaric acid mix-lanthanide coordination polymers with one-dimensional ladder-like chain structures present color-tunable and white-light emission upon varying the excitation wavelength.

Tunable white-light emission of SiAlON-base crystal/glass composite phosphor by variation of excitation wavelength

2013 ◽  
Vol 39 (8) ◽  
pp. 9809-9813 ◽  
Author(s):  
Jian Li ◽  
Zhi-yong Mao ◽  
Da-jian Wang ◽  
Ying-chun Zhu ◽  
Lin Gan ◽  
...  
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Crystal Glass ◽  
Excitation Wavelength ◽  
Glass Composite

scholarly journals White-Light Emitting Di-Ureasil Hybrids

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2246 ◽  
Author(s):  
Ming Fang ◽  
Lianshe Fu ◽  
Rute Ferreira ◽  
Luís Carlos
Keyword(s):  
White Light ◽  
Light Emission ◽  
Relative Concentration ◽  
Sol Gel ◽  
Quantum Yields ◽  
Excitation Wavelength ◽  
Light Sources ◽  
Efficient Energy Transfer ◽  
Visible Absorption ◽  
Light Emitting

White-light emitting materials have emerged as important components for solid state lighting devices with high potential for the replacement of conventional light sources. Herein, amine-functionalized organic-inorganic di-ureasil hybrids consisting of a siliceous skeleton and oligopolyether chains codoped with lanthanide-based complexes, with Eu3+ and Tb3+ ions and 4,4′-oxybis(benzoic acid) and 1,10-phenanthroline ligands, and the coumarin 1 dye were synthesized by in situ sol–gel method. The resulting luminescent di-ureasils show red, green, and blue colors originated from the Eu3+, Tb3+, and C1 emissions, respectively. The emission colors can be modulated either by variation of the relative concentration between the emitting centers or by changing the excitation wavelength. White light emission is achieved under UV excitation with absolute quantum yields of 0.148 ± 0.015, 0.167 ± 0.017, and 0.202 ± 0.020 at 350, 332, and 305 nm excitation, respectively. The emission mechanism was investigated by photoluminescence and UV–visible absorption spectroscopy, revealing an efficient energy transfer from the organic ligands to the Ln3+ ions and the organic dye, whereas negligible interaction between the dopants is discerned. The obtained luminescent di-ureasils have potential for optoelectronic applications, such as in white-light emitting diodes.

Hybrid polymer thin films with a lanthanide–zeolite A host–guest system: coordination bonding assembly and photo-integration

2014 ◽  
Vol 38 (8) ◽  
pp. 3540-3547 ◽  
Author(s):  
Ji-Na Hao ◽  
Bing Yan
Keyword(s):  
Thin Films ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Zeolite A ◽  
Hybrid Polymer ◽  
Hybrid Films ◽  
Coordination Bonding ◽  
Guest System

Three tricolor luminous materials based on novel transparent hybrid films of polymer–lanthanide–zeolite A were assembled. The white light emission from the tricolor luminous materials can be tuned easily by adjusting the different concentrations of the doped ions and the excitation wavelength.

Tunable white-light emission from mixed lanthanide (Eu3+, Gd3+, Tb3+) coordination polymers derived from 4-(dipyridin-2-yl)aminobenzoate

2014 ◽  
Vol 43 (28) ◽  
pp. 10940-10946 ◽  
Author(s):  
A. R. Ramya ◽  
Sunil Varughese ◽  
M. L. P. Reddy
Keyword(s):  
Coordination Polymers ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Novel Approach

A novel approach was developed for the generation of white-light emission from isostructural mixed Ln3+-4-(dipyridin-2-yl)aminobenzoate coordination polymers [Ln3+ = Eu3+ (1), Tb3+ (2), and Gd3+ (3)] by tuning the excitation wavelength.

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