Strongest Emission Intensity Research Articles

Highly efficient multi-colour upconversion emission of Yb3+/Er3+, Ho3+ codoped single LiYF4 octahedral microparticle

In this work, Yb3+/Er3+, Ho3+ codoped tetragonal-phase LiYF4 octahedral microparticles have been successfully synthesized through a facile hydrothermal method. Here, we implemented a confocal microscopy setup to manipulate and study the optical properties of a single LiYF4 microparticle under a focused NIR 980nm excitation. The strong multi-colour upconversion emission intensity with beautiful luminescent patterns have been clearly observed. And output colours (the different ratio of red-to-green emission intensity) of single LiYF4: Yb3+/Er3+, Ho3+ microparticles have been anticipated to be adjusted by controlling Yb3+ doping concentrations. The results show that the different ratio of red-to-green emission intensity of Er3+ and Ho3+ in single LiYF4 microparticle, which is due to the cross-relaxation processes and energy back transfer processes between Yb3+ ions and Er3+ or Ho3+ leading to different population densities of intermediate energy levels. The upconversion emission mechanisms and the influence of Yb3+ concentrations on upconversion emission properties of Er3+ and Ho3+ ions are also discussed according to the emission spectra and rate equations.

Enhancement of thermal stability and photoluminescent performance of blue light emitting material by incorporating adamantane moieties into carbazole system

ABSTRACTA facile route to improve photoluminescent performance and service lifetime of a promising blue light emitting material is reported and demonstrated here using a copolymer system of N-(2-ethylhexyl)-2,7-carbazole (Cz) and 1,3,5,7-tetrakis- (4-bromophenyl) adamantane (TBA). The copolymers were successfully synthesized by palladium-catalyzed Suzuki coupling reactions. Structure and molecular weight of the materials were characterized by FT-IR and 1H-NMR spectroscopies, elemental analysis and gel permeation chromatography. The influence of adamantane content on the thermal stability and photoluminescent performance of the synthesized copolymers was investigated in detail. DSC results showed that glass transition temperature increased dramatically, from 68°C for neat carbazole, to 88°C, 120°C and 152°C, after the addition of 10%, 20%, and 30% TBA, respectively. The same trend was found when thermal decomposition temperature at 5% weight loss was evaluated from TGA data. Importantly, this increased stability can be extended to thermo-optical performance, with the Cz-TBA system showing higher color purity and stronger emission intensity within blue light wavelength than carbazole alone. Nevertheless, measurements of emitting spectral stability at a broader temperature range (100–200°C) and photoluminescence quantum yield suggested that there is a delicate trade-off between the performance and adamantane content.

Studies on up/down-conversion emission of Yb3+ sensitized Er3+ doped MLa2(MoO4)4 (M = Ba, Sr and Ca) phosphors for thermometry and optical heating

The photoluminescence properties of Yb3+ sensitized Er3+ doped BaLa2(MoO4)4, SrLa2(MoO4)4 and CaLa2(MoO4)4 phosphors synthesized via hydrothermal method are investigated upon 980 nm and 380 nm light excitations. The phase, purity, and morphology of the samples are characterized by X-ray diffraction, Fourier transform infrared spectroscopy and Field emission scanning electron microscope. Among these three phosphors, the strongest emission intensity is seen in BaLa2(MoO4)4: Er3+/Yb3+ through both the 980 nm and 380 nm light excitations and is explained by the lifetime measurement of 4S3/2 level of Er3+ ion. Temperature sensing measurements were performed by using the fluorescence intensity ratio (FIR) of green emission bands originated from the two thermally coupled 2H11/2 → 4I15/2 and 4S3//2 → 4I15/2 transitions of Er3+ and maximum temperature sensitivity of 1.05% K−1 at 305 K is found for BLa2(MoO4)4: Er3+/Yb3+ sample. Moreover, the laser induced heating is measured in the samples and the maximum temperature of the sample particles is calculated as 422 K at 76 W/cm2 in BaLa2(MoO4)4: Er3+/Yb3+, pointing out large amount of heat generation in such phosphors. The BaLa2(MoO4)4: Er3+/Yb3+ also exhibits higher photothermal conversion efficiency of 46.7%.

Nearly pure NIR to NIR upconversion luminescence in Tm3+, Yb3+ co-doped ZnO-TiO2 composite phosphor powder

Tm3+ and Yb3+ co-doped ZnO-TiO2 composite system were successfully synthesized via powder-solution mixing method and their upconversion (UC) luminescence characteristics were studied as a function of various ZnO/TiO2 mixing ratios and dopant concentrations under 980 nm laser excitation. The XRD patterns showed that the product fired at 1300 °C consisted of four phases, Zn2TiO4, TiO2, RE2Ti2O7, and RE2TiO5 (RE = Tm3+ and/or Yb3+). The NIR emission centered at 795 nm wavelength was detected as the strongest emission intensity which it was in accordance with the 3H4 → 3H6 transition of Tm3+ ion. The NIR emission intensity of the products was varied by changing ZnO-TiO2 mixing ratios, and Tm3+ and Yb3+ concentrations. The simple chemical formula equations, for interpreting the site preference of Tm3+ and Yb3+ ions in the host crystal matrix, were originated by considering the host crystal structure, its crystal arrangement, and the effect of Tm3+ and Yb3+ ions to the changes in lattice parameters of host crystal. The 1ZnO:1TiO2 (in mole) doped with 0.125 mol% Tm3+, 15 mol% Yb3+ fired at 1300 °C for 1 h was the best condition that displayed highest NIR emission intensity. The possible UC mechanism was suggested and discussed in detail.

Photoluminescence properties of a double perovskite tungstate based red-emitting phosphor NaLaMgWO6:Sm3+

In this work, the conventional solid-state method was applied to synthesize a series of red-emitting NaLaMgWO6:Sm3+ phosphors. The crystal structure, phase purity, morphology, particle size distribution as well as elemental composition of the as-prepared phosphors were investigated carefully with the aid of XRD, SEM, EDS, FT-IR analyses, indicating the high-purity and micron-sized NaLaMgWO6:Sm3+ phosphors with monoclinic structure were prepared successfully. The spectroscopic properties of Sm3+ in NaLaMgWO6 host including UV–vis diffuse reflection spectrum, photoluminescence excitation and emission spectra, decay curves, chromaticity coordinates and internal quantum efficiency were investigated in detail. Upon excitation with UV (290nm) and n-UV (406nm), NaLaMgWO6:Sm3+ phosphor presented red emission corresponding to the 4G5/2→6HJ (J = 5/2, 7/2, 9/2, and 11/2) transitions of Sm3+, in which the hypersensitive electronic dipole transition 4G5/2→6H9/2 (645nm) was with the strongest emission intensity because Sm3+ ions were located at a lattice site with anti-inversion symmetry. The optimal concentration of Sm3+ was different for the given excitation wavelength such as 290nm and 406nm, which was interpreted by the extra effect of the energy transfer from W6+-O2- group to Sm3+. The decay lifetime for 4G5/2→6H9/2 transition of Sm3+ was very short (< 1ms) and decreased with the increasing Sm3+ concentration. The present investigation indicates that NaLaMgWO6:Sm3+ phosphor could be a potential red component for application in w-LEDs.

Defect induced visible-light-activated near-infrared emissions in Gd3−x−y−zYbxBiyErzGa5O12

Visible-light-activated near-infrared luminescent materials are promising photoluminescent materials due to their convenience and low cost. Crystal defects can seriously affect the performance of luminescent materials, and better understanding of the complexity of the structural disorder and electronic structures of such materials opens up new possibilities in luminescent material development. In this work, we successfully design a novel, effective, visible-light-activated near-infrared luminescent Gd3Ga5O12: 4.2%Yb3+, 8.4%Er3+, and 4.2%Bi3+ system based on first principles. This exhibits strong emission intensity and high luminous efficiency (0.993) and also has a lifetime (7.002 ms) that is at least twice as long as the longest lifetime reported in published papers. We utilize density functional theory with an effective LSDA + U method to study the structural properties of Gd3−x−y−zGa5O12: xYb3+, yBi3+, zEr3+ (GGG: Yb3+, Bi3+, Er3+). The d and f electron orbits of rare-earth ions are considered for an effective Hund exchange. Detailed analysis reveals that GGG: 4.2%Yb3+, 8.4%Er3+, 4.2%Bi3+ has the smallest cell volume because of the strong covalent bonds of Bi–O, Er–O, and Yb–O. Bi 3d is a hybridized state that acts as sensitizing ions during the process of luminescence in GGG: Yb3+, Bi3+, Er3+. Together with experimental and theoretical results, we analyze the influence of defects on emission intensity. The locations of Yb3+, Er3+, and Bi3+ are determined by X-ray absorption fine structure measurements, which are in agreement with the model constructed using first principles. This work may provide innovative guidance for the design of high-performance visible-light-activated near-infrared luminophores based on calculations and a new methodology for application of coherent laser radar and optical communication.

Improvement of photoluminescence properties of Ce3+- doped CaSrAl2SiO7 phosphors by charge compensation with Li+ and Na+

In this work, we prepared CaSr1-xAl2SiO7:xCe3+ (0.03 ≤ x ≤ 0.12) and CaSr0.94Al2SiO7:0.03Ce3+,0.03M+ (M+ = Li+ and Na+) phosphors via solid-state reaction method. Structural and photoluminescence (PL) properties of the phosphors were also investigated. The prepared phosphors formed an orthorhombic crystal structure with the P212121 space group. CaSr1-xAl2SiO7:xCe3+ phosphors were effectively excited by near-ultraviolet (UV) light (345nm), which is suitable with the emission of near-UV light emitting diode chips. A broad blue emission (402nm) was detected in CaSr1-xAl2SiO7:xCe3+ and CaSr0.94Al2SiO7:0.03Ce3+,0.03M+ phosphors; this was attributed to the 4f05d1 → 4f1 transition of Ce3+. To maintain charge equilibrium, charge compensators, such as monovalent Li+ and Na+ ions, were doped into the CaSr0.97Al2SiO7:0.03Ce3+ phosphor, significantly improving its PL properties. The strongest emission intensity was achieved in CaSr0.94Al2SiO7:0.03Ce3+,0.03Li+ phosphor. Addition of Li+ charge compensator was highly effective in improving PL properties of CaSr0.97Al2SiO7:0.03Ce3+ phosphors.

Influences of organic cation and hydrochloric acid additive on the morphology and photoluminescence of HC(NH2)2PbBr3 films

The hydrohalic acid additives have been used in perovskite thin films to improve the film morphology and optical properties. However, our study demonstrated that the hydrochloric acid (HCl) additive greatly improved the surface coverage but lowered the photoluminescence (PL) emission intensities of HC(NH2)2PbBr3 (HC(NH2)2 = FA) films. The effects of organic cation and hydrochloric acid additive on the morphology and photoluminescence of FAPbBr3 films were investigated. We found that FAPbBr3 films prepared with HCl additive in low FABr concentration environment displayed good film quality but weak PL emission intensity. The optical properties of FAPbBr3 films have close relationship with FABr concentration. The optical absorption edge of FAPbBr3 showed a blue shift with increasing the FABr concentration. The strong PL emission intensities of FAPbBr3 can be obtained from the solutions with high FABr concentration.

Preparation and Characterization of Poly-1,2,3-triazole with Chiral 2(5H)-Furanone Moiety as Potential Optical Brightening Agents.

A series of novel heterocyclic polymers with fluorescent brightening properties are synthesized via Click polymerization. Fast synthesis of poly-1,2,3-triazoles (Mn ≥ 9.31 kDa) is described herein, with a high yield of up to 95%. The Click polymerization approach has a number of advantages, including facile operation and outstanding isolation yield. The resultant polymers have a high thermal stability, excellent UV resistance, as well as acid and light fastness. On embedding with optical brightening agents, the polymers display strong fluorescent brightening properties in the tetrahydrofuran solution. Moreover, these products have a strong solution emission intensity and extraordinary photostability under UV light.

Structural and luminescent properties of germanate glasses and double-clad optical fiber co-doped with Yb3+/Ho3+

The 2 μm and upconversion emission in low phonon (805 cm−1) germanate glass and double-clad optical fibers co-doped with 0.7Yb2O3/(0.07–0.7)Ho2O3 ions have been investigated. Glasses with the strongest emission intensity (0.7Yb2O3/0.15Ho2O3 and 0.7Yb2O3/0.35Ho2O3) were used as core of double-clad (DC) optical fibers and comparative analysis of their luminescent properties have been performed. The spectral overlapping between emission and absorption bands at near-infrared (2 μm) in glass and DC optical fibers caused red shifting with the increase of optical fiber length. Differences in luminescence spectra measured for bulk glass and double-clad optical fibers in both visible and near-infrared spectral ranges have been presented and discussed in details.

The luminescence properties of Sr2-1.5x-1.5y P2 O7 :xDy3+ ,yCe3+ phosphor for near-UV-based white LEDs synthesized by a chemical co-precipitation method.

A series of Sr2 P2 O7 :Dy3+ , Sr2 P2 O7 :Ce3+ and Sr2 P2 O7 :Dy3+ ,Ce3+ phosphors was synthesized via the one-step calcination process for the precursors prepared by co-precipitation methods. The phases, morphology, quantum efficiency and photoluminescence properties of the obtained phosphors were characterized systematically. These results show that the near-spherical particles prepared through calcining the precursors by means of ammonium dibasic phosphate co-precipitation (method 3) have the smallest particle size and strongest emission intensity among the three methods in the paper. With Dy3+ concentration increasing in Sr2 P2 O7 :Dy3+ phosphors, the luminescence intensity first increases, reaches maximum, and then decreases. A similar trend was followed by Sr2 P2 O7 :Ce3+ with Ce3+ concentration increasing. A successful attempt was made to initiate the energy transfer mechanism from Ce3+ to Dy3+ in the host lattice and an overlap between the emission band of Ce3+ and the excitation band of Dy3+ indicated that the Ce3+ →Dy3+ energy transfer may indeed exist. It is clear that the photoluminescence intensity of Dy3+ as well as the quantum efficiency of the phosphor can be enhanced markedly by co-doping Ce3+ . Sr2 P2 O7 :Dy3+ ,Ce3+ has its (CIE) chromaticity coordinates in the bluish-white-light region, near the standard illuminant D65 . The CIE 1913 chromaticity coordinates of Sr2 P2 O7 :Dy3+ phosphors fall in the white-light region, and are adjacent to the ideal white-light coordinates. In addition, the colour temperature and colour tone of Sr2 P2 O7 :Dy3+ could be adjusted by changing the relative concentration of Dy3+ . In short, Sr2 P2 O7 :Dy3+ can be a promising single-phased white-light emitting phosphor for near-UV (NUV) w-LEDs.

Efficient red-emitting phosphor ScVO4 doped with Bi3+ and Eu3+ for near-ultraviolet-activated solid-state lighting

In this paper, Bi3+- and Eu3+-co-doped ScVO4 had been investigated as an alternative red-emitting phosphor under near-ultraviolet excitation. Structural and spectroscopic characterizations were carried out. The results show that the samples can efficiently absorb near-ultraviolet light and produce very bright red emission. In particular, the optimized sample shows much stronger emission intensity than the commercial phosphor Y2O2S: 5% Eu3+ in the excitation range of 365–395 nm, and can reach a strength 5.4 times of the latter under 385 nm excitation. It also has better CIE chromaticity coordinates. These suggest ScVO4: Bi3+, Eu3+ as a promising red-emitting phosphor for white light-emitting diodes based on near-ultraviolet light-emitting diode chips.

Temperature characteristics of green upconversion fluorescence of Er3+-doped SrGdGa3O7 crystal

Temperature characteristics of 980-nm-upconverted green 530 and 550nm fluorescence of Er3+-doped SrGdGa3O7 single crystal have been studied for temperature sensing purposes. To achieve that, a simple experimental setup has been developed that consists of a 980nm laser diode, two interference filters, two Si-photocells and two multimeters, while without use of monochromator or focusing lens for fluorescence collection. The study shows that the Er3+-doped SrGdGa3O7 crystal displays strong green emission intensity (hence good signal-to-noise ratio) and high temperature sensitivity of fluorescence intensity ratio of the 530 and 550nm emissions, which is (5.6–104.0) × 10−3K−1 in the considered temperature range 100–430K, depending on the temperature. In addition, the experiments were repeated using a spectrometer and consistent results of temperature characteristics were obtained. Present study shows that the Er3+-doped SrGdGa3O7 crystal is a promising host material for optical temperature sensing.

Luminescence properties of Y2O3:Bi3+, Yb3+ co-doped phosphor for application in solar cells

Bismuth (Bi3+) and ytterbium (Yb3+) co-doped yttrium oxide (Y2O3) phosphor powder was successfully synthesised using the co-precipitation technique. The X-ray diffraction (XRD) patterns confirmed that a single phase cubic structure with a Ia-3 space group was formed. The visible emission confirmed the two symmetry sites, C2 and S6, found in the Y2O3 host material and revealed that Bi3+ ions preferred the S6 site as seen the stronger emission intensity. The near-infrared (NIR) emission of Yb3+ increased significantly by the presence of the Bi3+ ions when compared to the singly doped Y2O3:Yb3+ phosphor with the same Yb3+ concentration. An increase in the NIR emission intensity was also observed by simply increasing the Yb3+ concentration in the Y2O3:Bi3+, Yb3+ phosphor material where the intensity increased up to x = 5.0mol% of Yb3+ before decreasing due to concentration quenching.

Demonstration of a mid-wavelength infrared narrowband thermal emitter based on GaN/AlGaN quantum wells and a photonic crystal

We experimentally demonstrate a thermal emitter with a narrow-bandwidth and low background emission, operating in the mid-wavelength infrared (MWIR) range, based on a combination of intersubband transitions in GaN/AlGaN multiple quantum wells and optical resonance in a photonic crystal slab. The fabricated device exhibits single-peak narrowband thermal emission with a Q factor of 93 at a wavelength of 4.0 μm. Stable operation at high temperatures over 700 °C has been demonstrated owing to the good thermal stability of GaN/AlGaN, which enables the generation of strong peak emission intensity as high as 93 mW/μm/sr/cm2. Such a narrow-band and low-background emitter in the MWIR range has been difficult to realize by metal or heavily doped semiconductor-based emitters due to the broadband emission characteristics of the materials and by GaAs/AlGaAs-based emitters due to the thermal instability of the materials. Our device can be applied to various MWIR applications including CO2 and NOx gas sensing systems.

Effects of flux on the luminescence of MgGa2O4:Mn2+ phosphors

The effects of H3BO3 and MgF2 fluxes on the crystal structure and photoluminescence (PL) of MgGa2O4:Mn2+ phosphors were investigated. The PL excitation spectra of the powders consisted of intensive broad bands (∼290nm), and sharp peaks at longer wavelengths. The former could be attributed to charge transfer between the Mn2+ and O2− ions, referred to as charge transfer band (CTB), while the latter was attributed to the d–d transitions of Mn2+ ions. Under CTB excitation, the PL spectra exhibited green emission peaks at 505nm, assignable to the 4T1(4G) → 6A1(6S) transition of Mn2+ ions in tetrahedral sites. Compared to MgF2, H3BO3 was more favorable for phase formation, higher crystallinity, and particle size enlargement, thus resulting in a significant enhancement in the emission intensity. The Mn2+ concentration affected the CTB and the crystal structure; the strongest emission intensity was observed for a high Mn2+ concentration of 0.5mol%.

Microneedle: The future of pharmaceutical and cosmeceutical delivery systems

Quantum dots are semiconducting nanocrystals with diameters between 2-10 nanometers. Strong signal brightness, resistance to photo bleaching, size-tunable emission and large absorption coefficient across a wide spectral range make them powerful agent against conventional organic fluorescence dyes used in bioimaging applications. In addition to their optical imaging ability, quantum dots have multifunctional properties such as functionalization with targeting ligands for site specific delivery and loading with therapeutic drugs, peptides or oligonucleotides for drug and gene delivery applications thanks to their high surface to volume ratio. However, most of the synthesized QD’s emit in the visible region and they contain heavy metals such as Cd, Pb or Hg, which have intrinsic toxicity to living organisms. Ag2S QDs developed in recent years are of great interest with their excellent biocompatibility and strong emission intensity in near infrared region (NIR) of optical spectrum, offering higher photon penetration depth, lower absorption and scattering of light by cellular components and lower auto-fluorescence in the living tissue compared to visible region. Yet, the Ag2S compositions reported are still limited to anionic and PEGylated ones. We have focused on the development of first cationic Ag2S QDs for combined action of optical imaging and gene therapy. Here, we will discuss the synthesis of PEI coated Ag2S QDs, characterization and applications. PEI coating itself usually do not provide luminescent QDs. Yet, combination with small thiolated molecules provide means to tune the emission wavelength and intensity. We will discuss the influence of 2-mercaptopropionic acid and l-cysteine contribution in this formulation. Further we will discuss the effect of the coating composition on surface charge, size and biocompatibility. Optical imaging and gene delivery performance of these particles will be demonstrated as well.

Thermally Activated Delayed Fluorescence Organic Dots (TADF Odots) for Time‐Resolved and Confocal Fluorescence Imaging in Living Cells and In Vivo

The fluorophores with long‐lived fluorescent emission are highly desirable for time‐resolved fluorescence imaging (TRFI) in monitoring target fluorescence. By embedding the aggregates of a thermally activated delayed fluorescence (TADF) dye, 2,3,5,6‐tetracarbazole‐4‐cyano‐pyridine (CPy), in distearoyl‐sn‐glycero‐3‐phosphoethanolamine‐poly(ethylene glycol) (DSPE‐PEG2000) matrix, CPy‐based organic dots (CPy‐Odots) with a long fluorescence lifetime of 9.3 μs (in water at ambient condition) and high brightness (with an absolute fluorescence quantum efficiency of 38.3%) are fabricated. CPy‐Odots are employed in time‐resolved and confocal fluorescence imaging in living Hela cells and in vivo. The green emission from the CPy‐Odots is readily differentiated from the cellular autofluorescence background because of their stronger emission intensities and longer lifetimes. Unlike other widely studied DSPE‐PEG2000 encapsulated Odots which are always distributed in cytoplasm, CPy‐Odots are located mainly in plasma membrane. In addition, the application of CPy‐Odots as a bright microangiography agent for TRFI in zebrafish is also demonstrated. Much broader application of CPy‐Odots is also prospected after further surface functionalization. Given its simplicity, high fluorescence intensity, and wide availability of TADF materials, the method can be extended to develop more excellent TADF Odots for accomplishing the challenges in future bioimaging applications.

Luminescent Properties of (SrNa)&amp;lt;sub&amp;gt;2-x &amp;lt;/sub&amp;gt;Eu&amp;lt;sub&amp;gt;x&amp;lt;/sub&amp;gt;(MoO&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt;)&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; Red Phosphors Prepared by Using the Sol-Gel Process

A series of (SrNa)2-xEux(MoO4)3 red phosphors have been synthesized by using the sol-gel method. X-ray diffraction, used to characterize the crystallization process of the phosphor precursors, indicates that the (SrNa)2-xEux(MoO4)3 phosphors had an SrMoO4 structure. The properties of these resulting phosphors have also been characterized by using photoluminescence (PL) spectra. The PL results indicate that all of the (SrNa)2-xEux(MoO4)3 phosphors exhibit intense red emissions under 275, 395, and 465-nm excitation. The two strongest lines at 395 and 465 nm in the excitation spectra of these phosphors match well with the two popular emissions from near-UV and blue GaN-based light-emitting diodes. Some process parameters for Eu3+ concentration, (C6H8O7)·H2O concentration, and solution pH value were also investigated. For (SrNa)2-xEux(MoO4)3 phosphors, there are two maximum emission intensities appearing with x = 0.6 and x = 1.4, respectively. When the molar ratio of citric acid is equal to that of metal cations and the solution pH is almost 4, (SrNa)2-xEux(MoO4)3 shows the strongest emission intensity compared to those under other conditions.

Nitroaromatic explosives detection by a luminescent Cd(II) based metal organic framework

A Cd(II) based coordination polymer, [Cd(3-bpd)(N(CN)2)2]n (1), where 3-bpd is 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, has been synthesized and characterized by standard methods including single crystal X-ray diffraction technique. Singly crystal X-ray diffraction analysis shows that it is a 3-dimensional metallo-organic framework. 1 exhibits strong emission intensity in dispersed acetonitrile at 430nm when it is excited at 340nm. Among different explosive and pollutant nitroaromatic compounds (epNACs), trinitrophenol (TNP) is able to quench emission intensity of 1 drastically making 1 as the turn-off chemosensor for TNP. Other epNACs, e.g. 2,4,6-trinitrotoluene (TNT), 2,6-dinitro toluene (2,6-DNT), nitrobenzene (NB), 1,3-dinitro benzene (1,3-DNB), 3,4-dinitrotoluene (3,4-DNT) and 4-nitrobenzoic acid (4-NBA) cannot quench the emission intensity of 1 significantly. The quenching constant value of 1 for TNP has been determined to be 7.16×104M−1. Limit of detection of the complex towards TNP is 6×10−5M. Resonance energy transfer (RET) is involved in the transfer of energy from the electronically excited donor, 1 to the acceptor, TNP thereby quenching the emission intensity. Some theoretical calculations have been performed to support the electronic transitions and the proposed mechanism.