34993-56-1Relevant articles and documents
Fluorogenic supramolecular complexes formed between pyrenyl-β-cyclodextrin and glyco-rhodamine for the selective detection of lectins
He, Xiao-Peng,Li, Ri-Hui,Maisonneuve, Stphane,Ruan, Yibin,Chen, Guo-Rong,Xie, Juan
, p. 14141 - 14144 (2014)
Fluorogenic supramolecular complexes formed between tubular-shaped pyrenyl-β-cyclodextrins and glyco-rhodamine are determined to respond to a selective lectin with 'turn-on' fluorescence with excellent selectivity over a range of competing species. This journal is
Development of UV-excitable red and near-infrared fluorescent labels and their application for simultaneous multicolor bioimaging by single-wavelength excitation
Mizuno, Tetsuya,Umezawa, Keitaro,Shindo, Yutaka,Citterio, Daniel,Oka, Kotaro,Suzuki, Koji
, p. 1007 - 1018 (2013)
We report a new type of UV-excitable red/NIR-emissive fluorescent dyads (PKF series). Conjugation of a pyrene and a novel bright red/near-infrared (NIR) fluorophore resulted in large quasi-Stokes shift while retaining intense fluorescence emission and sharp spectral bands. Labeling of PKF dyads to biomolecules was performed by means of introduction of a succinimidyl ester. Simultaneous Ca2+/albumin dual-color intracellular imaging by PKF in combination with fura-2 (UV-excitable/VIS-emissive Ca2+ indicator) reveals its usefulness as a new bioimaging tool.
Synthesis and solid-state polymerization of 5-(pyren-1-yl)penta-2,4- diyn-1-ol derivatives with an n-phenylurethane or n-benzylurethane group
Okada, Shuji,Oshimizu, Shuhei,Sato, Tsubasa,Takeshi, Shoko,Tatewaki, Yoko,Yamakado, Ryohei
, p. 6356 - 6365 (2020)
A series of 5-(pyren-1-yl)penta-2,4-diyn-1-yl N-phenylcarbamates and N-benzylcarbamates were synthesized. Phenyl groups in the N-phenyl and N-benzyl moieties were unsubstituted (H-0 and H-1, respectively) and 3,4,5-trialkoxy substituted (CmO-0 and CmO-1, respectively), in which the alkyl groups introduced were methyl (m = 1), octyl (m = 8), dodecyl (m = 12), and hexadecyl (m = 16) groups. Upon UV irradiation, a regular 1,4-addition polymerization to form polydiacetylene was confirmed for H-0, H-1, C8O-1, C12O-1, and C16O-1. For C1O-0 and C1O-1, the crystal structures were solved, and the reasons the regular polymerization did not occur were clarified. From the powder X-ray diffraction study, crystallinities of CmO-1 were found to be lower than those of CmO-0, although CmO-1 regularly polymerized. This indicates that the total crystallinity is not directly related to local ordering around one-dimensional arrays for the polymerization direction. Polymerized CmO-1 species were soluble in chloroform. Their processability enabled us to fabricate cast films of polydiacetylene as well as the monomer. The conductivities of C12O-1 and the polymer (PC12O-1) were evaluated in the pristine and iodine-doped states and in the charge-transfer-complexed states with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane. A conductivity of 1.2 × 10-2 S m-1 for iodine-doped PC12O-1 was achieved. In this case, pyrene moieties seemed to play an important role in realizing the appropriate electron transfer from pyrene moieties to iodine molecules and effective π conjugation between the pyrene moieties and the PDA backbone promoting charge transport.
Auxiliary donors for phenothiazine sensitizers for dye-sensitized solar cells-how important are they really?
Buene, Audun Formo,Ose, Eline Ekornhol,Zakariassen, Ane Garborg,Hagfeldt, Anders,Hoff, B?rd Helge
, p. 7581 - 7590 (2019)
Auxiliary donors are common design motifs for phenothiazine sensitizers for dye-sensitized solar cells. Despite this, there are only a few reports on their overall contribution to the photon-to-electron conversion efficiency. Twelve sensitizers have been prepared and investigated, including ten different auxiliary donors in addition to a control with no auxiliary donor. The various auxiliary donors improved the PCE by a modest 4-11%, and pyrene (AFB-19) was determined to be the most efficient auxiliary donor, with the best cell delivering a PCE of 5.36%. Included in the dye series was also the champion dye within the phenothiazine class. With a reported PCE of 12.1%, it would be an excellent phenothiazine reference dye. The high VOC of 0.83 V of this dye is worth further investigation, but the absorption and photovoltaic performance in this work does not correlate with the previously reported PCE of 12.1%.
Strong circularly polarized luminescence induced from chiral supramolecular assembly of helical nanorods
Wang, Yuxiang,Li, Xiaojing,Li, Fei,Sun, Wei-Yin,Zhu, Chengjian,Cheng, Yixiang
, p. 7505 - 7508 (2017)
Chiral supramolecular assemblies (BNS-BPP) can be self-assembled by electrostatic and π-π stacking interactions between the chiral binaphthyl sulphonate (BNS) anion and the achiral bipyrene-based pyridinium (BPP) cation chromophore. BNS-BPP can exhibit st
DBU-Mediated Synthesis of Aryl Acetylenes or 1-Bromoethynylarenes from Aldehydes
Thummala, Yadagiri,Karunakar, Galla V.,Doddi, Venkata Ramana
supporting information, p. 611 - 616 (2019/01/04)
Two well known synthetic organic reactions Ramirez olefination and Corey-fuchs reactions are integrated in one-pot sequential manner for the synthesis of arylacetylenes and 1,3-enynes starting directly from commercially available aldehydes. The bicyclic amidine 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) along with additive NaOH not only exclusively afforded the terminal alkynes directly from the aldehydes, but also enhanced the reaction rate. The dynamic nature of DBU also facilitated the isolation of 1-bromoalkynes intermediate products. Selection of additive from NaOH and H2O served as a switch for the synthesis of terminal alkyne and 1-bromoalkynes, respectively. (Figure presented.).
