scholarly journals Synthesis and Macrocyclization-Induced Emission Enhancement of Benzothiadiazole-based Macrocycle

2021 ◽  
Author(s):  
Chunju Li ◽  
Yue-Ling Bai ◽  
Lei Cui ◽  
Shuo Li
Keyword(s):  
Solid State ◽  
Topological Structure ◽  
Concentration Quenching ◽  
Device Performance ◽  
Dilute Solution ◽  
Strong Emission ◽  
Emission Enhancement ◽  
Intramolecular Motion ◽  
One Step ◽  
Novel Strategy

Abstract We presented a novel strategy for the improvement of luminophore’s solid-state emission, i.e., macrocyclization-induced emission enhancement (MIEE), by linking luminophores through C(sp3) bridges to give a macrocycle. Benzothiadiazole-based macrocycle (BT-LC) has been synthesized by a one-step condensation of the monomer 4,7-bis(2,4-dimethoxyphenyl)-2,1,3-benzothiadiazole (BT-M) with paraformaldehyde, catalyzed by Lewis acid. BT-LC shows strong emission in both dilute solution and aggregated state. Moreover, in comparison with the monomer, macrocycle BT-LC produces much more intense fluorescence in the solid state (ΦPL=99%) and exhibits better device performance in the application of OLEDs. The MIEE can be ascribed to the restriction of intramolecular motion and the alleviation of the concentration quenching by the macrocyclic topological structure.

Solid-state electrochromic devices: relationship of contrast as a function of device preparation parameters

2014 ◽  
Vol 2 (14) ◽  
pp. 2510-2516 ◽  
Author(s):  
Amrita Kumar ◽  
Michael T. Otley ◽  
Fahad Alhasmi Alamar ◽  
Yumin Zhu ◽  
Blaise G. Arden ◽  
...  
Keyword(s):  
Solid State ◽  
Preparation Method ◽  
Electrochromic Device ◽  
Device Performance ◽  
Performance Parameters ◽  
Electrochromic Devices ◽  
Large Area ◽  
One Step ◽  
Relationship Of

The establishment of a relationship between device performance parameters is reported here for a versatile one-step preparation method of a large area solid-state electrochromic device.

Thermoelectric properties of Sb-doped tin oxide by a one-step solid-state reaction

2021 ◽  
Author(s):  
Leilane R. Macario ◽  
Andrew Golabek ◽  
Holger Kleinke ◽  
Edson R. Leite
Keyword(s):  
Solid State ◽  
Thermoelectric Properties ◽  
Tin Oxide ◽  
Solid State Reaction ◽  
One Step

scholarly journals Redox-promoted associative assembly of metal–organic materials

2016 ◽  
Vol 7 (1) ◽  
pp. 707-712 ◽  
Author(s):  
Martin Glavinović ◽  
Feng Qi ◽  
Athanassios D. Katsenis ◽  
Tomislav Friščić ◽  
Jean-Philip Lumb
Keyword(s):  
Solid State ◽  
Self Assembly ◽  
Organic Materials ◽  
Metal Oxidation ◽  
Metal Organic ◽  
One Step

We develop an associative synthesis of metal–organic materials that combines solid-state metal oxidation and coordination-driven self-assembly into a one-step, waste-free transformation.

scholarly journals Luminescence of Eu3+ in Some Scandium Phosphates

2021 ◽  
pp. 638-640
Author(s):  
Rajani A. Bhoyar ◽  
A. C. Nayak
Keyword(s):  
Solid State ◽  
Energy Levels ◽  
Concentration Quenching ◽  
Lanthanide Ions ◽  
Photoluminescence Properties ◽  
Trivalent Metal ◽  
Suitable Host ◽  
Relative Ease ◽  
Luminescence Efficiency ◽  
Light Lanthanides

Lanthanide ions are very efficient activators. Due to the presence of shielded 4f shell, the energy levels can be predicted with relative ease. Interaction with the surrounding lattice is minimum and luminescence efficiency is high. For this reason, many important phosphors having various applications have been discovered which use lanthanide activators. For obtaining efficient phosphors, it is important to find a suitable host for lanthanide activators which can accommodate these ions without concentration quenching. The hosts must be transparent to the emitted light. Lanthanides, most commonly occur as trivalent. Thus, hosts constituted by trivalent metals can be suitable. Yttrium compounds have been extensively studied as hosts. Scandium is another trivalent metal. Compared to the yttrium compounds, Scandium compounds have been very scarcely studied as hosts. We are investigating Scandium compounds as luminescence hosts. Synthesis and photoluminescence properties of Sr9 Sc (PO4)7 : Eu3+ and Sr8MgSc(PO4)7:Eu3+ phosphor are described in this work. The phosphors were prepared by solid state reaction. Usually, these phosphors are reduced and results on Eu2+ photoluminescence are reported. However, we have recorded photoluminescence before reduction and thus new results on Eu3+ emission could be obtained.

scholarly journals Nitrile-Substituted 2-(Oxazolinyl)-Phenols: Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-Based Fluorophores

2020 ◽  
Author(s):  
Dominik Göbel ◽  
Daniel Duvinage ◽  
Tim Stauch ◽  
Boris Nachtsheim
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Density Functional ◽  
Intramolecular Proton Transfer ◽  
Crystal Structure Analysis ◽  
Quantum Yields ◽  
Functional Theory ◽  
Emission Properties ◽  
Emission Enhancement

Herein, we present minimalistic single-benzene, excited-state intramolecular proton transfer (ESIPT) based fluorophores as powerful solid state emitters. The very simple synthesis gave access to all four regioisomers of nitrile-substituted 2(oxazolinyl)phenols (MW = 216.1). In respect of their emission properties they can be divided into aggregation-induced emission enhancement (AIEE) luminophores (1-CN and 2-CN), dual state emission (DSE) emitters (3-CN) and aggregation-caused quenching (ACQ) fluorophores (4‐CN). Remarkably, with compound 1-CN we discovered a minimalistic ESIPT based fluorophore with extremely high quantum yield in the solid state ΦF = 87.3% at λem = 491 nm. Furthermore, quantum yields in solution were determined up to ΦF = 63.0%, combined with Stokes shifts up till 11.300 cm–1. Temperature dependent emission mapping, crystal structure analysis and time-dependent density functional theory (TDDFT) calculations gave deep insight into the origin of the emission properties.<br>

Simple and novel strategy to fabricate ultra-thin, lightweight, stackable solid-state supercapacitors based on MnO2-incorporated CNT-web paper

Energy ◽  
2018 ◽  
Vol 142 ◽  
pp. 608-616 ◽  
Author(s):  
Bebi Patil ◽  
Suhyun Ahn ◽  
Changyong Park ◽  
Hyeonjun Song ◽  
Youngjin Jeong ◽  
...  
Keyword(s):  
Solid State ◽  
Novel Strategy
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