SYNTHETIC METALS
·
2013
·
IF 2.109
Wang Gang,Tan Haijun,Zhang Yiping,Wu Yingying,Hu Zhubin,Yu Guipeng,Pan Chunyue
Novel D-π-A system organic dyes (ID1, ID2 and ID3) based on isoindigo (ID), which contain triphenylamine (ID1) or isoindigo (ID2 and ID3) as electron donors, isoindigo and thiophene as a π-conjugated system and a cyanoacrylic acid moiety as an electron acceptor and anchoring group, have been then synthesized and characterized by 1 H NMR, UV–vis, CV. Dye-sensitized solar cells (DSSCs) based on these dyes were also fabricated and tested. As the photovoltaic performance tests demonstrated, the ID1 exhibits broader absorption spectra , higher maximum incident photon-to-current conversion efficiency (IPCE) and maximum photon-to-electron conversion efficiency ( η ) of 3.33% under 100 mW/cm 2 simulated AM 1.5G solar irradiation.
研究领域:
材料科学
·
能源科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Yao Pei,Ran Wang,Xiang Rong,Xiang Xia,Hexiang Wang,Zongwei Zhang,Tian Qiu,Saran Long,Jianjun Du,Jiangli Fan,Wen Sun,Xiaojun Peng
ABSTRACT The key factor in photothermal therapy lies in the selection of photothermal agents. Traditional photothermal agents generally have problems such as poor photothermal stability and low photothermal conversion efficiency. Herein, we have designed and synthesized an isoindigo (IID) dye. We used isoindigo as the molecular center and introduced common triphenylamine and methoxy groups as rotors. In order to improve the photothermal stability and tumor targeting ability, we encapsulated IID into nanoparticles . As a result, the nanoparticles exhibited high photothermal stability and photothermal conversion efficiency (67%) upon 635 nm laser irradiation. Thus, the nanoparticles demonstrated a significant inhibitory effect on live tumors in photothermal therapy guided by photoacoustic imaging and provided a viable strategy to overcome the treatment challenges.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Hua Gu,Shouli Ming,Kaiwen Lin,Shuai Chen,Ximei Liu,Baoyang Lu,Jingkun Xu
Isoindigo has been found to be an excellent electron-accepting building block towards electroactive conjugated polymers with remarkable optoelectronic properties for organic electronics due to its ease of scalable synthesis with high yields. Isoindigo-based conjugated polymers have been successfully applied in organic photovoltaics and organic field effect transistors most recently, yet have attracted surprisingly scant attention in polymeric electrochromics despite their potential advantages. Herein, to evaluate the electrochromic performances of isoindigo-based materials, we synthesized two donor–acceptor–donor (D–A–D) type precursors of isoindigo moiety end-capped with 3,4-ethylenedioxythiophene (EDOT), ( E )-6,6′-bis(2,3-dihydrothieno[3,4- b ] [1,4]dioxin-5-yl)-1,1′-dihexyl-[3,3′-biindolinylidene]-2,2′-dione (IDOHE) and ( E )-6,6′-bis(2,3-dihydrothieno[3,4- b ] [1,4]dioxin-5-yl)-1,1′-didodecyl-[3,3′-biindolinylidene]-2,2′-dione (IDODE) by Stille coupling, and electropolymerized them to get the corresponding polymer films. These p and n -dopable low band-gap polymers (∼1.26 eV) revealed electrochromic nature from green color in the neutral state to blue upon oxidation . Further kinetic investigation demonstrated isoindigo-EDOT polymers exhibited outstanding electrochromic performances especially in the NIR region, including high coloration efficiency of 362 cm 2 C −1 at 1050 nm, fast switching time of 0.5 s, and high optical contrast of 59% at 1500 nm, and excellent redox stability (<8% after 4000 cycling). Based on these findings, isoindigo-EDOT polymers possessed competitive electrochromic parameters suffice for device fabrication and commercial applications and can be further explored towards indoor electrochromic products and flexible NIR displays. Overall, isoindigo and its derivatives can be regarded as a series of promising acceptors for synthesizing high-performance D-A type NIR electrochromic polymers.
研究领域:
材料科学
·
有机电子学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 17
·4984-4992
·
IF 5.368
Zhenguo Wang,Jie Zhao,Ying Li,Qiang Peng
A low band-gap copolymer, PDTS-FID, containing alternating dithienosilole (DTS) donor blocks and fluorinated isoindigo (FID) units, and its non-fluorinated counterpart, PDTS-ID, have been synthesized and characterized for photovoltaic applications. Compared to PDTS-ID, its fluorinated counterpart, PDTS-FID, exhibits broader and stronger absorption, lower-lying HOMO and LUMO energy levels, and higher hole mobility, resulting in an improved open-circuit voltage (Voc), short-circuit current density (Jsc), fill factor (FF) and power conversion efficiency (PCE). The positive effects were attributed to the fluorinated isoindigo block which favored a linear and planar conformation, giving rise to better backbone packing of the related copolymer, which was also confirmed by theoretical calculations (DFT). The conventional and inverted devices were fabricated and evaluated to explore the photovoltaic properties of the resulting copolymers. The best performance of 5.79% PCE was obtained from an inverted polymer solar cell (PSC) using PDTS-FID as the donor material, with a Voc of 0.84 V, a Jsc of 10.77 mA cm−2 and a FF of 0.64. These low band-gap copolymers could be expected to be promising donor materials for application in PSCs.
研究领域:
材料科学
·
有机光电材料
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2013
·
IF 2.109
Qian Liu,Zhengkun Du,Weichao Chen,Liang Sun,Yanhua Chen,Mingliang Sun,Renqiang Yang
One isoindigo and triphenylamine (TPA) based small molecule was synthesized by Suzuki coupling reaction. The obtained molecule was characterized by 1 H NMR 13 C NMR and MS. The obtained molecule absorbs light from 400 to 743 nm in thin solid film. The band-gaps of the resulting molecule calculated from the absorption onset and cyclic voltammetry are respectively around 1.67 eV and 1.60 eV. Photovoltaic cell by using the blend of the obtained small molecule and [6,6]-phenyl-C 61 butyric acid methyl ester (PCBM) as an active layer was fabricated by spin-coating method. The solar cells show open-circuit voltage ( V oc ) of 1.0 V with maximum power conversion efficiency 0.61%. This high open-circuit voltage is among the highest in literatures for solution processed small molecule organic solar cells .
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 19
·2300244
·
IF 4.6
Yu Wang,Hongsen Wang,Jinni Deng,Yi Pan,Zhaohui Zheng,Xiaobin Ding
Photothermal tumor therapy (PTT) and photoacoustic imaging (PA) have emerged as promising noninvasive diagnostic and therapeutic approaches for cancer treatment. However, the development of efficient PTT agents with high photostability and strong near-infrared (NIR) absorption remains challenging. This study synthesizes three isoindigo-based dual-acceptor conjugated polymers (CPs) (P-IIG-TPD, P-IIG-DPP, and P-IIG-EDOT-BT) via a green and nontoxic direct arylation polymerization (DArP) method and characterizes their optical, electrochemical, and NIR photothermal conversion properties. By incorporating two acceptors into the backbone, the resulting polymers exhibit enhanced photothermal conversion efficiency (PCE) due to improved synergy among conjugation length, planarity, and intramolecular charge transfer (ICT). The nanoparticles (NPs) of P-IIG-EDOT-BT and P-IIG-DPP have a uniform size distribution around 140 nm and exhibit remarkable NIR absorption at 808 nm. In addition, P-IIG-EDOT-BT and P-IIG-DPP NPs exhibit high PCEs of 62% and 78%, respectively. This study promotes the molecular design of CPs as NIR photothermal conversion materials and provides guidance for the development of novel dual-acceptor CPs for tumor diagnosis and treatment.
研究领域:
材料科学
·
生物医学工程
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 20
·11840-11851
·
IF 3.108
Huihui Xie,Min Wang,Lingqian Kong,Yan Zhang,Xiuping Ju,Jinsheng Zhao
Isoindigo (iI)-containing donor (D)–acceptor (A)-type polymers have rarely been used as electrochromic materials although their applications in the field of organic photoelectric devices have achieved significant progress in only a few years. Three conjugated polymers, namely, P1–P3, were synthesized via the random copolymerization of three units, including thiophene and 3,3-bis-decyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine (ProDOT-decyl2) as the D units, and alkyl-substituted isoindigo as the A unit, and the reactions were conducted by the Stille polymerization method. The results showed that the feed ratio of the D units to the A unit had a substantial effect on the electrochemical properties, optical band gap, color presentation, and electrochromic parameters (changes in transmittance, response time, coloration efficiency and persistence of optical contrasts for a long period) of the conjugated polymers. Polymers were easily obtained with the feed ratios (thiophene : iI : ProDOT) of 2 : 1 : 1, 4 : 1 : 3, and 5 : 1 : 4 for P1, P2 and P3, respectively. P1 exhibits a cyan color in the neutral state and a transmissive grey color in the oxidized state. Both P2 and P3 display a change from black to transmissive on conversion from the neutral to the oxidized state. An increase in the ProDOT content was helpful for enabling the extension of the absorption peak of the polymers across the entire spectrum and also improving the switching property of the polymers. In general, the introduction of iI as the A unit for the construction of D–A-type polymers provides the field of electrochromic devices with verifiable performance and deserves further investigation to obtain more promising electrochromic materials.
研究领域:
材料科学
·
有机电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）