苯并三氮唑类化合物的合成及生物活性

设计并合成了6种新的苯并三氮唑类化合物,其结构均经^1H NMR和IR确认。初步测定了其生物活性．结果表明6种化合物对小白菜的胚根、根和苗的生长均具有一定的调节作用。     

间接原子吸收法测定苯并三氮唑

乙酸钠介质中 ,加入过量的铜 (Ⅱ )与苯并三氮唑生成沉淀 ,用火焰原子吸收法测定上清液中剩余的铜(Ⅱ ) ,工作曲线法测定了工业合成样品及内燃机冷却水中的苯并三氮唑。该方法测定苯并三氮唑线性范围为1 2mg/L～ 30mg/L ,回收率 (n =5)为 98.9～ 1 0 1 .0 %。文中还测定了难溶化合物的溶解度、溶度积和化合物的组成比。     

高效液相色谱法测定苯并三氮唑

提出了高效液相色谱法测定苯并三氮唑产品以及工业循环冷却水中苯并三氮唑含量的方法。色谱分离采用Kromasil C18(4.6 mm×250 mm,5μm)色谱柱,以乙腈-水(25+75)为流动相,流量为1.0 mL.min-1,检测波长为260 nm。苯并三氮唑的质量浓度在3.84~76.8 mg.L-1范围内与峰面积呈线性关系,平均回收率为96.4%。     

含苯并三氮唑单元的聚对苯撑乙炔类聚合物的合成及性能

利用Pd（Ⅱ）配合物为催化剂,使用4,7-二溴-2-十二烷基-1,2,3-苯并三氮唑和1,4-二乙炔基-2,5-二（烷氧基）苯通过Sonogashira反应合成了3个带有不同长度烷氧基侧链,主链中含有1,2,3-苯并三氮唑单元的聚苯乙炔类聚合物。采用FT-IR、1H-NMR对其化学结构进行了表征。结果表明：这类聚合物的数均分子量在0.93×104～1.13×104,苯并三氮唑单元上长链烷基和苯环上长链烷氧基的存在使此类聚合物在CHCl3、THF等溶液中的溶解度较大,其固态薄膜也较容易制备,聚合物在固态薄膜状态下的紫外-可见最大吸收波长比在CHCl3溶液中红移了约45 nm,在固态薄膜状态下的荧光发射峰比在CHCl3溶液中也发生了较大的红移。     

丙烯酰基苯并三氮唑及其聚合物光物理过程的研究

1-N-丙烯酰基苯并三氮唑(ABT)及其聚合物-聚丙烯酰基苯并三氮唑(PABT)作为功能高分子材料的母体和重要原料已引起人们的重视。如报道[1]利用PABT可制备聚丙烯酸及其各种不同的酯类、带芳酰胺或脂肪酰胺侧基的各种聚酰胺化合物等。     

苯并三噻吩共轭聚合物的合成及其在有机光伏中的应用

以三(二亚苄基丙酮)二钯(Pd_2(dba)_3)为催化剂,三甲苯基磷(P(o-tol)_3)为配体,4,3'-十二烷基-2,2'-联二噻吩(M1)和2,8-二溴-5-(2-己基癸基)苯并三噻吩(M2)为单体,采用Stille交叉偶联反应,合成了基于苯并三噻吩和联二噻吩单元的共轭聚合物(PBTT)。采用热重分析、紫外-可见分光光度计及电化学分析分别研究了聚合物PBTT的热性能、光学性能和电化学性能。结果表明:聚合物PBTT具有优异的热稳定性和低的最高占有轨道能级(HOMO);聚合物薄膜最大吸收峰位于469 nm,光学能带隙为2.10 eV;将聚合物与[6,6]-苯基-C_(61)-丁酸甲酯(PC_(61)1BM)共混材料作为活性层制作了本体异质结构太阳能电池器件,在模拟太阳光源AM 1.5 G 100 mW/cm~2照射条件下,该器件获得了高达1.00 V的开路电压,初步的能量转化效率为0.43%。     

苯并噻二唑类有机太阳能电池材料研究进展

苯并噻二唑结构单元被广泛用来构建高光电转换效率的有机太阳能电池材料.从聚合物太阳能电池、有机小分子太阳能电池以及染料敏化太阳能电池三个方面系统地综述了近年来含苯并噻二唑基团的有机太阳能电池材料的研究进展,并对其发展趋势和应用前景做了展望.     

含茂基苯并三氮唑基镧系有机配合物的合成及表征

三茂基镧系化合物和苯并三氮唑在四氢呋喃中反应,合成了7个未见文献报道的含茂基苯并三氮唑基镧系有机配合物,经元素分析、IR和MS测定,从有关数据推测了这类配合物的可能结构。     

Advances in Organic Near‐Infrared Materials and Emerging Applications

Much progress has been made in the field of research on organic near‐infrared materials for potential applications in photonics, communications, energy, and biophotonics. This account mainly describes our research work on organic near‐infrared materials; in particular, donor‐acceptor small molecules, organometallics, and donor‐acceptor polymers with the bandgaps less than 1.2 eV. The molecular designs, structure‐property relationships, unique near‐infrared absorption, emission and color/wavelength‐changing properties, and some emerging applications are discussed.     

有机太阳能电池用聚合物给体材料的研究进展

有机太阳能电池由于质轻、价廉、柔性,受到人们的广泛关注.开发性能优异的聚合物给体材料,是近期有机太阳能电池研究的主流方向之一.迄今为止,已经成功开发出各种各样具有优秀的给体性质的共轭聚合物.基于这些材料制备的有机太阳能电池器件,已经突破9%的光电转换效率.按照聚合物给体材料的主链结构分类,综述了近年来这方面的研究进展.对一些受到普遍关注的材料,从设计思想、性能剖析到器件制备和性能,做了详细的介绍,以期能够深层次理解材料的化学结构-凝聚态结构-性能间的基本规律,为今后的材料研发提供有价值的参考.     

Recent Progress in Organic Solar Cells: A Review on Materials from Acceptor to Donor

In the last few decades, organic solar cells (OSCs) have drawn broad interest owing to their advantages such as being low cost, flexible, semitransparent, non-toxic, and ideal for roll-to-roll large-scale processing. Significant advances have been made in the field of OSCs containing high-performance active layer materials, electrodes, and interlayers, as well as novel device structures. Particularly, the innovation of active layer materials, including novel acceptors and donors, has contributed significantly to the power conversion efficiency (PCE) improvement in OSCs. In this review, high-performance acceptors, containing fullerene derivatives, small molecular, and polymeric non-fullerene acceptors (NFAs), are discussed in detail. Meanwhile, highly efficient donor materials designed for fullerene- and NFA-based OSCs are also presented. Additionally, motivated by the incessant developments of donor and acceptor materials, recent advances in the field of ternary and tandem OSCs are reviewed as well.     

齐聚噻吩及其衍生物有机光伏材料

齐聚噻吩及其衍生物具有良好的环境稳定性和优异的光电性能,是一类具有良好发展前景的有机功能材料。本文综述了近年来齐聚噻吩及其衍生物的发展状况,简述了其主要合成方法;根据结构将其分为两大类:一类是不含极性基团或仅含弱极性基团的齐聚噻吩衍生物,另一类是给体-受体型齐聚噻吩衍生物,并讨论了它们作为有机光伏材料的应用。给体-受体型齐聚噻吩衍生物由于分子内的电荷传输作用,其光物理和电化学性能均优于不含极性基团的齐聚噻吩,该类材料在小分子光伏器件中具有最高的光电转换效率(>10%)。文章最后简要分析了影响光伏器件性能的主要因素。     

Organic Photovoltaic Properties Based on Oligothiophenes

Organic photovoltaic devices have attracted a great attention because of their light weight and processability, and the ease of material design on the molecular level. There are a number of reports on organic photovoltaic devices using a variety of dyes1-…     

Fluorinated Photovoltaic Materials for High‐Performance Organic Solar Cells

Over the past decade, organic solar cells (OSCs) have achieved a dramatic boost in their power conversion efficiencies from about 6 % to over 16 %. In addition to developments in device engineering, innovative photovoltaic materials, especially fluorinated donors and acceptors, have become the dominant factor for improved device performance. This minireview highlights fluorinated photovoltaic materials that enable efficient OSCs. Impressive OSCs have been obtained by developing some important molds of fluorinated donor and acceptor systems. The molecular design strategy and the matching principle of fluorinated donors and acceptors in OSCs are discussed. Finally, a concise summary and outlook are presented for advances in fluorinated materials to realize the practical application of OSCs.     

Wide Band Gap Non‐Fullerene Small Molecular Acceptors Containing Spirobifluorene and Benzotriazole with Three Different End‐Capped Groups for P3HT‐Based Organic Solar Cells

Spirofluorene (SF) and benzo[d][1,2,3]triazole (BTA) have been considered as promising building blocks to construct n‐type photovoltaic materials. Herein, three new small molecule acceptors (SMAs) named BTA21 , BTA23 and BTA27 with the structure of A₂ = A₁‐D‐A₁ = A₂ have been designed, in which SF and BTA were used as a central unit of D and bridged acceptor unit of A₁, respectively. In addition, 3‐ethylrhodanine, 2‐(3‐ethyl‐4‐ oxothiazolidin‐2‐ylidene)malononitrile and malononitrile were chosen as terminal acceptor units to modulate the properties of the final SMAs. Three SMAs show wide optical band gaps (E_g) of 2.19, 2.15 and 2.21 eV, respectively, with gradually down‐shift of the lowest unoccupied molecular orbital (LUMO) levels in the order of BTA21 , BTA23 and BTA27 depending on the electron‐withdrawing capability of terminal acceptor units. BTA21 shows great advantages with respect to donor poly(3‐hexylthiophene) (P3HT) over BTA23 and BTA27 , such as well energy‐level matching, complementary absorption and proper morphology. Concequently, P3HT: BTA21 shows the best power conversion efficiency (PCE) value of 3.28% with an open‐circuit voltage (V_OC) of 1.02 V, a short‐circuit current (J_SC) of 5.45 mA·cm^–2 and a fill factor (FF) of 0.59. These results indicate that the terminal acceptor group end‐capped in SMAs plays a significant role in controlling their optical, electronic, and photovoltaic properties.     

含铕配合物的有机电致发光器件的光伏效应

自从1986年Ｔａｎｇ发表了双层有机电致发光器件有光伏效应[1]以来,人们就一直对有机器件的光伏效应有浓厚的兴趣,特别是近年来有大量的文章报道有机器件的光伏效应。在这些报道中,使用材料中有用聚苯乙炔及其衍生物的[2,3],有用Ｃ60做电子受体的[4],但这些研究都与电致发光无关,仅研究了光电转换特性,我们研究组首次报道了电子给体发光,电子受体稀土配合物不发光的有机光伏器件[5]。本文就是在此基础上进一步研究铕配合物ＯＥＬ器件的光伏效应。铕配合物ＯＥＬ器件不仅仅有利于利用配体三重态能量、提高能量转换效率的潜力,而且中心离…     

Near Infrared Organic Semiconducting Materials for Bulk Heterojunction and Dye‐Sensitized Solar Cells

Dye sensitized solar cells (DSSCs) and bulk heterojunction (BHJ) solar cells have been the subject of intensive academic interest over the past two decades, and significant commercial effort has been directed towards this area with the vison of developing the next generation of low cost solar cells. Materials development has played a vital role in the dramatic improvement of both DSSC and BHJ solar cell performance in the recent years. Organic conjugated polymers and small molecules that absorb solar light in the visible and near infrared (NIR) regions represent a class of emering materials and show a great potential for the use of different optoelectronic devices such as DSSCs and BHJ solar cells. This account describes the emering class of near infrared (NIR) organic polymers and small molecules having donor and acceptors units, and explores their potential applications in the DSSCs and BHJ solar cells.