A new class of organic donor-acceptor molecules with large third-order optical nonlinearities.
نویسندگان
چکیده
Donor-acceptor molecules with 4-(dimethylamino)phenyl donor and 1,1,4,4-tetracyanobuta-1,3-diene acceptor moieties are readily prepared by short, high-yielding routes. The quite small chromophores are characterised by X-ray crystallography and feature intense intramolecular charge-transfer bands, substantial quinoid character in the donor rings, reversible electrochemical reductions and oxidations and powerful third-order optical nonlinearities.
منابع مشابه
Structure–property relationships and third-order nonlinearities in diketopyrrolopyrrole based D–π–A–π–D molecules
Nine new quadrupolar chromophores based on diketopyrrolopyrrole were designed and prepared by cross-coupling reactions. The property tuning has been achieved by structural variation of the peripheral substituents (donor) and enlargement of the π-system. Fundamental properties of target molecules were studied by differential scanning calorimetry, electrochemistry, and absorption and emission spe...
متن کاملResonant third-order hyperpolarizabilities of large organic molecules
Third-order nonlinear optical processes have attracted considerable interest recently because of their potential applications in optical phase conjugation, optical computing, and dynamic holography and their power as a spectroscopic tool.' Many of the studies, however, deal with inorganic semiconductors, photorefractive materials, and atomic vapors.2 The main research on organic materials in th...
متن کاملDFT and TD-DFT calculation of new thienopyrazine-based small molecules for organic solar cells
BACKGROUND Novel six organic donor-π-acceptor molecules (D-π-A) used for Bulk Heterojunction organic solar cells (BHJ), based on thienopyrazine were studied by density functional theory (DFT) and time-dependent DFT (TD-DFT) approaches, to shed light on how the π-conjugation order influence the performance of the solar cells. The electron acceptor group was 2-cyanoacrylic for all compounds, wher...
متن کاملUNDERSTANDING BEHAVIOR OF ANTINEOPLASTIC MOLECULES BASED ON MLR MODELS
New statistic based models provide a wide area of prediction equipments for different science areas. Among these fields biology have just entered the contest of interdisciplinary sciences. Drug discovery is a long and expensive process which could be decreased with theoretical approaches. In this study, 500 reported assayed anti cancer molecules were extracted from Science Direct articles, sket...
متن کاملReticulated heterojunctions for photovoltaic devices.
Herein we present a molecular self-assembly process on the surface of transparent electrodes that yields a new type of organic semiconductor device structure: the donor deposits as supramolecular cables, and the acceptor subsequently infiltrates this network. This process results in a donor–acceptor interface that is interwoven at the nanoscale. When incorporated into photovoltaic devices, such...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Chemical communications
دوره 6 شماره
صفحات -
تاریخ انتشار 2005