10028-70-3Relevant articles and documents
Ultralong Phosphorescence from Organic Ionic Crystals under Ambient Conditions
Cheng, Zhichao,Shi, Huifang,Ma, Huili,Bian, Lifang,Wu, Qi,Gu, Long,Cai, Suzhi,Wang, Xuan,Xiong, Wei-Wei,An, Zhongfu,Huang, Wei
, p. 678 - 682 (2018)
A new type of materials, organic salts in the crystal state, have ultralong organic phosphorescence (UOP) under ambient conditions. The change of cations (NH4+, Na+, or K+) in these phosphors gives access to tun
A Reduced Graphene Oxide/Disodium Terephthalate Hybrid as a High-Performance Anode for Sodium-Ion Batteries
Cao, Tengfei,Lv, Wei,Zhang, Si-Wei,Zhang, Jun,Lin, Qiaowei,Chen, Xiangrong,He, Yanbing,Kang, Fei-Yu,Yang, Quan-Hong
, p. 16586 - 16592 (2017)
As a promising candidate for large-scale energy storage systems, sodium-ion batteries (SIBs) are experiencing a rapid development. Organic conjugated carboxylic acid anodes not only have tailorable electrochemical properties but also are easily accessible. However, the low stability and electrical conductivity hamper their practical applications. In this study, disodium terephthalate (Na2TP), the most favorable organic conjugated carboxylic acid anode material for SIBs, was proposed to integrate with graphene oxide (GO) by an anti-solvent precipitation process, which ensures the uniform and tight coating of GO on the Na2TP surface. GO is electrochemically reduced during the first several cycles of the electrochemical measurement, which buffers the volume change and improves the electrical conductivity of Na2TP, resulting in a better cyclic and rate performance. The incorporation of only 5 wt % GO onto Na2TP leads to a reversible capability of 235 mA h g?1 after 100 cycles at a current rate of 0.1 C, which is the best among the state of the art organic anodes for SIBs. The one-step synthesis together with the low costs of the raw materials show a promise for the scalable preparation of anode materials for practical SIBs.
A polyimide based all-organic sodium ion battery
Banda, Harish,Damien, Dijo,Nagarajan, Kalaivanan,Hariharan, Mahesh,Shaijumon, Manikoth M.
, p. 10453 - 10458 (2015)
Developing new approaches to improve the performance of organic electrodes for rechargeable sodium batteries is important. Here, we report studies on N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) as a novel cathode for a sodium battery and demonstrate an all-organic sodium ion battery using this polyimide as the cathode and disodium terephthalate (NaTP) (pre-sodiated) as the anode. The synthesised PI exhibits excellent electrochemical properties, when studied as the cathode for sodium batteries, with a reversible capacity of 126 mA h g-1 along with good capacity retention and rate capability, in the voltage range of 1.5 to 3.5 V vs. Na+/Na. The all-organic sodium ion full cell delivered an initial capacity of 73 mA h g-1, with an average cell voltage of 1.35 V. The attractive electrochemical performance combined with the design flexibility of a PTCDA based PI material, offer new possibilities for the development of efficient all-organic sodium ion batteries.
Dramatic luminescence signal from a Co(II)-based metal-organic compound due to the construction of charge-transfer bands with Al3+ and Fe3+ ions in water: Steady-state and time-resolved spectroscopic studie
Daga, Pooja,Majee, Prakash,Singha, De Bal Kanti,Manna, Priyanka,Hui, Sayani,Ghosh, Ananta Kumar,Mahata, Partha,Mondal, Sudip Kumar
, p. 4376 - 4385 (2020)
To study the photophysics and understand the mechanism of metal ion sensing, a luminescent cobalt-based metal-organic compound, [Co(bpds)(bdc)(H2O)2]·bpds (1), was synthesized at room temperature from 4,4-bipyridyl disulphide (bpds) and 1,4-benzene dicarboxylic acid (bdc) by layer diffusion. Structure determination based on single-crystal X-ray analysis revealed a parallel interpenetrated structure of two-dimensional layers along with a layer of uncoordinated bpds ligand. An aqueous suspension of 1 showed intense blue emission at 421 nm. In the presence of few micromolar of Al3+ ions, a dramatic change in the luminescence spectrum around an isoemissive point was observed with the appearance of a new peak at 380 nm. A similar phenomenon was observed in the presence of Fe3+ ions. For other metal ions, no significant changes in the luminescence spectrum of 1 were observed. Detailed lifetime decay analysis and Fourier-transform infrared spectroscopy revealed that Al3+ ions form charge-transfer complexes (or adducts) with uncoordinated bpds ligands through pyridine nitrogen atoms, resulting in a new emission peak at 380 nm. Time-resolved study revealed that the quenching of luminescence was dynamic in nature and associated with an increase in the non-radiative rate constant. Moreover, the luminescence property of 1 was ultrasensitive to the presence of Al3+ and Fe3+ ions in water, even in a mixture of many other ions, with detection limits of 0.35 and 0.25 μM, respectively.
