In the title compound, C(28)H(21)Cl, the dihedral angle between the two fluorene ring systems is 71.97 (4)°. There is an intra-molecular C-H⋯Cl hydrogen bond. In the crystal structure, the centroid-to-centroid distance between stacked fluorene ring systems is ca 4.22 Å, which indicates that there are no π-π stacking inter-actions between them.
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http://dx.doi.org/10.1107/S1600536808012117 | DOI Listing |
IUCrdata
December 2024
Department of Chemistry, National College, Tiruchirappalli, Tamil Nadu, India.
In the title compound, CHBrN, the dihedral angles between the fluorene fused-ring system and the pendant phenyl groups are 67.76 (12) and 88.38 (12)°.
View Article and Find Full Text PDFBioorg Chem
December 2024
CSIR-Central Institute of Medicinal and Aromatic Plants, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, U.P. 201002, India. Electronic address:
Present study aimed at a single component cyclization of 2-benzylidene-1-tetralones for the preparation of 5H-benzo[c]fluorenes and their antiproliferative activity. This ring closure reaction underwent via reductive cyclization in the presence of a sodium borohydride-aluminium chloride system. Ten diverse 5H-benzo[c]fluorene derivatives were prepared and evaluated for antiproliferative activity against three human cancer cell lines by SRB assay.
View Article and Find Full Text PDFEcotoxicol Environ Saf
November 2024
Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361102, China; College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China. Electronic address:
Polycyclic aromatic hydrocarbons (PAHs) in semi-enclosed gulfs are influenced by physical and biochemical processes, which haven't been well understood. This study aims to investigate the spatial distribution and vertical profiles of dissolved PAHs in the Beibu Gulf (BG) and adjacent waters of the South China Sea, along with hydrological, meteorological, and biochemical variables. Particularly relevant are the effects of atmospheric pressure, salinity, ammonium, chlorophyll-a, as well as riverine inputs (RI), sea currents, and upwelling.
View Article and Find Full Text PDFACS Appl Mater Interfaces
October 2024
Department of Applied Chemistry, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu, Taiwan 30010.
In this work, we designed two nitrogen-bridged fluorene-based heptacyclic FNT and nonacyclic FNTT ladder-type structures, which were constructed by one-pot palladium-catalyzed Buchwald-Hartwig amination. FNT and FNTT were further end-capped by FIC acceptors to form two FNT-FIC and FNTT-FIC non-fullerene acceptors (NFAs), respectively. The two NFAs exhibit more red-shifted absorption and higher crystallinity compared to those of the corresponding carbon-bridged FCT-FIC and FCTT-FIC counterparts.
View Article and Find Full Text PDFComp Biochem Physiol C Toxicol Pharmacol
October 2024
Research and Development Center for Watershed Environmental Eco-Engineering, Beijing Normal University, Zhuhai 519087, PR China; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China. Electronic address:
The exploration of sediment pollution caused by PAHs and its impact on microbial communities can provide valuable insights for the remediation of sediments. The spatial distribution of PAHs and their impact on the microbial community within the Pearl River Estuary were investigated in this study. The findings revealed that the total concentration ranges of 16 PAHs were between 24.
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