LUMINESCENCE ENHANCEMENT OF EU(III)-CHELATED COMPLEXES BASED ON NAPHTHALENE DERIVATIVE THROUGH COORDINATION ENVIRONMENT

2004 ◽  
Vol 13 (03n04) ◽  
pp. 627-632 ◽  
Author(s):  
NAM SEOB BAEK ◽  
SOO-GYUN ROH ◽  
YONG HEE KIM ◽  
MIN-KOOK NAH ◽  
HWAN KYU KIM
Keyword(s):  
Lanthanide Complexes ◽  
Photophysical Properties ◽  
Europium Complex ◽  
Photoluminescence Spectra ◽  
Europium Complexes ◽  
Coordination Environment ◽  
Luminescence Enhancement ◽  
Red Emission ◽  
Naphthalene Derivative ◽  
Pl Intensity

We have designed and synthesized novel luminescent lanthanide complexes based on a naphthalene derivative. The coordination number of complexed ligands with Eu 3+ ions is an important parameter to enhance the photoluminescence (PL) intensity. The photoluminescence spectra of Eu ( III )-cored complexes exhibit a sharp red emission band at 612 nm, corresponding to the 5 D 0→7 F 2 transition of the trivalent Eu ion. The saturated europium complexes (C-2 and C-3) have much stronger PL intensity than the unsaturated 6-coordinated europium complex (C-1), due to the instability of the C-1 complex. In this paper, the synthesis and photophysical properties of novel europium(III)-chelated complexes based on a naphthalene derivative will be discussed.

Efficient red emission from poly(vinyl butyral) films doped with a novel europium complex based on a terpyridyl ancillary ligand: synthesis, structural elucidation by Sparkle/RM1 calculation, and photophysical properties

2016 ◽  
Vol 7 (5) ◽  
pp. 1147-1157 ◽  
Author(s):  
Chaolong Yang ◽  
Shaojun Liu ◽  
Jing Xu ◽  
Youbing Li ◽  
Mingyong Shang ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Europium Complex ◽  
Structural Elucidation ◽  
Ancillary Ligand ◽  
Red Emission ◽  
Ligand Synthesis ◽  
Complex Polymer ◽  
Vinyl Butyral

The first example of doped Eu-complex/polymer fluorescent films based on a PVB matrix is reported.

Synthesis, Characterization, and Luminescent Properties of a Red-Emitting Europium Complex

2012 ◽  
Vol 512-515 ◽  
pp. 1771-1775
Author(s):  
Li Ying Zhang ◽  
Bin Li ◽  
Gang Lv
Keyword(s):  
Photophysical Properties ◽  
Luminescent Properties ◽  
Europium Complex ◽  
Maximum Efficiency ◽  
Red Emission ◽  
Phenanthroline Ligand ◽  
Organic Devices ◽  
20 Nm

a fluorine functionalized 1,10-phenanthroline ligand, 3-ethyl-2-(2-fluorophenyl) imidazo[4,5-f]1,10-phenanthroline(EFPIP) and the corresponding red-emitting Eu(ΙΙΙ) complex Eu(DBM)3(EFPIP) (DBM = dibenzoylmethanate) was synthesized and the photophysical properties and electroluminescent(EL) performances were researched. When Eu(DBM)3(EFPIP) was used as emitting material in organic devices, the maximum efficiency and luminance of red emission achieved from the EL device with the configuration of ITO/m-MTDATA (30 nm)/NPB (20 nm)/ x wt% Eu(DBM)3(EFPIP) doped in CBP (30 nm)/Bphen (20 nm)/Alq3 (20 nm)/LiF (0.8 nm)/Al were 3.6 cd/A and 563 cd/m2, respectively. Compared with the previously reported devices based on methyl or chlorine substitute Eu(ΙΙΙ) complexes, the EL performances of the device using Eu(DBM)3(EFPIP) as an emitter was significantly enhanced due to the introduction of fluorine.

Synthesis and photoluminescence properties of MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors

Open Physics ◽  
2012 ◽  
Vol 10 (2) ◽  
Author(s):  
Xipu He ◽  
Junli Huang ◽  
Liya Zhou ◽  
Qi Pang ◽  
Fuzhong Gong
Keyword(s):  
Luminescence Intensity ◽  
Emission Spectra ◽  
Concentration Quenching ◽  
Excitation Band ◽  
Photoluminescence Spectra ◽  
Photoluminescence Properties ◽  
Red Emission ◽  
Reaction Method ◽  
Red Phosphors ◽  
Pl Intensity

AbstractA series of new red phosphors, MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K), were synthesized using the solidstate reaction method, and their photoluminescence spectra were measured. The MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors were efficiently excited by an ultraviolet (UV; 395 nm) source, and showed intense orange-red emission at 595 nm. Further investigation of the concentration-dependent emission spectra indicated that the MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors exhibit the strongest luminescence intensity when y = 0.01 in NaZr2(0:95−y)(PO4)3:Eu0.103+, Bi2y 3+ and y = 0.09 in NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+, whereas the relative PL intensity decreases with increasing Bi3+ concentration due to concentration quenching. The addition of Bi3+ widens the excitation band of NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+ around 320 nm, which provides the useful idea of broadening the excitation band around 300–350 nm to fit the ultraviolet chip.

scholarly journals New Coumarin Dipicolinate Europium Complexes with a Rich Chemical Speciation and Tunable Luminescence

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1265
Author(s):  
Sebastiano Di Di Pietro ◽  
Dalila Iacopini ◽  
Aldo Moscardini ◽  
Ranieri Bizzarri ◽  
Mauro Pineschi ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Emission Spectroscopy ◽  
Lanthanide Complexes ◽  
Chemical Speciation ◽  
Photophysical Properties ◽  
Molecular Probes ◽  
Paramagnetic Nmr ◽  
Europium Complexes ◽  
Wide Range ◽  
Simple Chemical

Europium (III) luminescent chelates possess intrinsic photophysical properties that are extremely useful in a wide range of applications. The lack of examples of coumarin-based lanthanide complexes is mainly due to poor photo-sensitization attempts. However, with the appeal of using such a versatile scaffold as antenna, especially in the development of responsive molecular probes, it is worth the effort to research new structural motifs. In this work, we present a series of two new tris coumarin-dipicolinate europium (III) complexes, specifically tailored to be either a mono or a dual emitter, tuning their properties with a simple chemical modification. We also encountered a rich chemical speciation in solution, studied in detail by means of paramagnetic NMR and emission spectroscopy.

A Highly Luminescent Europium Complex Showing Visible-Light-Sensitized Red Emission: Direct Observation of the Singlet Pathway

2004 ◽  
Vol 43 (38) ◽  
pp. 5010-5013 ◽  
Author(s):  
Chi Yang ◽  
Li-Min Fu ◽  
Yuan Wang ◽  
Jian-Ping Zhang ◽  
Wing-Tak Wong ◽  
...  
Keyword(s):  
Visible Light ◽  
Direct Observation ◽  
Europium Complex ◽  
Red Emission

Effects of electron-withdrawing groups in imidazole-phenanthroline ligands and their influence on the photophysical properties of EuIII complexes for white light-emitting diodes

2017 ◽  
Vol 41 (18) ◽  
pp. 9826-9839 ◽  
Author(s):  
Boddula Rajamouli ◽  
Rachna Devi ◽  
Abhijeet Mohanty ◽  
Venkata Krishnan ◽  
Sivakumar Vaidyanathan
Keyword(s):  
Thin Film ◽  
Quantum Yield ◽  
White Light ◽  
Light Emitting Diode ◽  
Photophysical Properties ◽  
Red Light ◽  
Europium Complexes ◽  
Light Emitting ◽  
White Light Emitting Diodes ◽  
Phenanthroline Ligands

The red light emitting diode (LED) was fabricated by using europium complexes with InGaN LED (395 nm) and shown digital images, corresponding CIE color coordinates (red region) as well as obtained highest quantum yield of the thin film (78.7%).

Highly‐Luminescent DTTA‐Appended Water‐Soluble Lanthanide Complexes of 4‐(Het)aryl‐2,2′‐bipyridines: Synthesis and Photophysical Properties

2019 ◽  
Vol 4 (20) ◽  
pp. 6377-6381 ◽  
Author(s):  
Alexey P. Krinochkin ◽  
Dmitry S. Kopchuk ◽  
Grigory A. Kim ◽  
Il'ya N. Ganebnykh ◽  
Igor S. Kovalev ◽  
...  
Keyword(s):  
Lanthanide Complexes ◽  
Photophysical Properties ◽  
Water Soluble

Synthesis and photophysical properties of europium complexes with heterotopic hexadentate ligands based on 2,2’-bipyridyl-6,6’-dicarboxamide

2017 ◽  
Vol 27 (5) ◽  
pp. 459-461 ◽  
Author(s):  
Anastasiia V. Kharcheva ◽  
Denis A. Evdokimov ◽  
Marina D. Reshetova ◽  
Viktor I. Yuzhakov ◽  
Svetlana V. Patsaeva ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Europium Complexes

Photophysical properties of a series of high luminescent europium complexes with fluorinated ligands

2011 ◽  
Vol 131 (2) ◽  
pp. 328-335 ◽  
Author(s):  
Jiangbo Yu ◽  
Ruiping Deng ◽  
Lining Sun ◽  
Zhefeng Li ◽  
Hongjie Zhang
Keyword(s):  
Photophysical Properties ◽  
Europium Complexes ◽  
Fluorinated Ligands
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