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http://dx.doi.org/10.1016/s0021-9673(01)80634-8 | DOI Listing |
Angew Chem Int Ed Engl
January 2025
Eberhard Karls Universität Tübingen: Eberhard Karls Universitat Tubingen, Institut für Organische Chemie, Auf der Morgenstelle 18, 72076, Tübingen, GERMANY.
The direct incorporation of borondipyrromethene (BODIPY) subunits into the structural backbone of covalent organic frameworks (COFs) gives facile access to porous photosensitizers but is still a challenging task. Here, we introduce β‑ketoenamine-linked BDP‑TFP‑COF, which crystallizes in AA‑stacking mode with hcb topology. A comprehensive characterization reveals high crystallinity and enhanced stability in a variety of solvents, excellent mesoporosity (SABET = 1042 m2 g-1), broad light absorption in the visible region, and red emission upon the exfoliation of few-layer COF nanosheets.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
Indian Institute of Technology-Delhi (IIT Delhi), Hauz Khas, New Delhi 110016, India.
Observation-based verification of regional/national methane (CH) emission trends is crucial for transparent monitoring and mitigation strategy planning. Although surface observations track the global and sub-hemispheric emission trends well, their sparse spatial coverage limits our ability to assess regional trends. Dense satellite observations complement surface observations, offering a valuable means to validate emission trends, especially in regions where emissions changes are substantial but debated.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
School of Public Health and the Second Affiliated Hospital of School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
Background: Tear samples were low-invasive to access and may reflect changes in the brain. We performed an exploratory proteomic analysis using tear samples to identify proteomic signature and potential pathways that may be associated with mild cognitive impairment (MCI) and dementia.
Method: We performed a matched case-control study using tear samples collected from community-dwelling older adults, comprising 13 dementia, as well as 34 MCI and 34 age-, sex-, educational-matched normal cognition (NC) controls (age: 73.
Adv Sci (Weinh)
January 2025
College of Materials Science and Engineering, National and Local Joint Engineering Research Center for Green Processing, Technology of Agricultural and Forestry Biomass, Central South University of Forestry and Technology, Changsha, 410004, China.
The directional migration of S-vacancy is beneficial to the separation of photogenerated carriers and the transition of electrons in semiconductors. In this study, Bi/BiS@carboxylic-cellulose (CC) photocatalyst with bionic chloroplast structure is obtained by electron beam irradiation to induce S-vacancy in BiS@CC. The results of CO photoreduction experiments demonstrate that the reduction rate of CO to CHOH by Bi/BiS@CC-450 samples is 10.
View Article and Find Full Text PDFNat Commun
January 2025
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.
Direct carbonylation of CH to CHCOOH provides a promising pathway for upgrading of natural gas to transportable liquid chemicals, in which high-efficiency CH activation and controllable C-C coupling are both critical but challenging. Herein, we report that highly efficient photo-driven carbonylation of CH with CO and O to CHCOOH is achieved over MoS-confined Rh-Zn atomic-pair in conjunction with TiO. It delivers a high CHCOOH productivity of 152.
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