Results 111 to 120 of about 35,436 (307)

A Concise Total Synthesis of (--)-Maoecrystal Z [PDF]

open access: yes, 2011
The first total synthesis of (--)-maoecrystal Z is described. The key steps of the synthesis include a diastereoselective Ti^(III)-mediated reductive epoxide coupling reaction and a diastereoselective Sm^(II)-mediated reductive cascade cyclization ...
Cha, Jacob Y.   +2 more
core   +2 more sources

Tracing the Dynamic Chemical Transformations of Spiro‐OMeTAD in Operating Perovskite Solar Cells

open access: yesAdvanced Science, EarlyView.
Mapping of Spiro‐OMeTAD layer's chemistry and electronic properties in PSC: Advanced cluster ion‐beam sputtering depth profile XPS reveals that environmental stressors (light, potential, and moisture) trigger the decomposition of LiTFSI dopants in Spiro‐OMeTAD.
Chittaranjan Das   +6 more
wiley   +1 more source

Substituent Effects on the Stability and Antioxidant Activity of Spirodiazaselenuranes

open access: yesMolecules, 2015
Spirodiazaselenuranes are structurally interesting compounds and the stability of these compounds depends highly on the nature of the substituents attached to the nitrogen atoms.
Devappa S. Lamani   +2 more
doaj   +1 more source

Investigating nano-structured domains within ionic liquids: the effect of cation change on thermal equilibrium and relaxation of spiropyran and spirooxazine. [PDF]

open access: yes, 2009
The established belief that ionic liquids (ILs) behave as homogenous solvents such as that observed in molecular solvents has been challenged.1, 2 Previous use of solvatochromic probe dyes has allowed for the traditional parameter of ‘polarity’ to be ...
Byrne, Robert   +2 more
core  

Substrate‐Affinitive P‐Type Azapolycyclic Photosensitizer for Chemoselective Nitrilization Under Mild Conditions

open access: yesAdvanced Science, EarlyView.
We developed a series of quinoxalinoquinoxaline (QQ) photosensitizers featuring high and tunable excited‐state reduction potentials (E(PC•+/PC*) = –1.76 to –2.05 V vs. SCE). Their hydrogen‐bonding interaction with carbonyl substrates enables selective single‐electron transfer events for selective nitrilization of 1° amides, offering a tunable ...
Seongwoo Bae, Dongwook Kim, Jinwoo Kim
wiley   +1 more source

3'-R-Spiro[cycloalkyl-1(2), (hetaryl-3(4), 6'-[1,2,4]triazino[2,3-c]quinazoline]-2'(7'H)-2-оnes as a perspective class of compounds with actoprotective activity

open access: yesZaporožskij Medicinskij Žurnal, 2017
Quinazolines and their derivatives are a perspective class of compounds with versatile biological activities. Their representatives are used in medical practice as sleeping, diuretic, antimicrobial and antitumor drugs.
O. S. Kolomoets   +6 more
doaj   +1 more source

Chemical signatures of the Anthropocene in the Clyde Estuary, UK: sediment hosted Pb, 207/206 Pb, Total Petroleum Hydrocarbons (TPH), Polyaromatic Hydrocarbon (PAH) and Polychlorinated Bipheny (PCB) pollution records [PDF]

open access: yes, 2011
The sediment concentrations of total petroleum hydrocarbons (TPHs), polyaromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), Pb and 207/206Pb isotope ratios were measured in seven cores from the middle Clyde estuary (Scotland, UK) with an aim ...
Chenery, S.R.   +5 more
core   +1 more source

Solution‐Processed Nickel Oxide as Efficient Hole Transport Layers in Inverted Perovskite Solar Cells

open access: yesAdvanced Science, EarlyView.
This review summarizes recent advances in four mainstream solution‐based techniques for synthesizing NiOx hole‐transport layers for high‐performance perovskite photovoltaic cells, and highlights the key challenges and future prospects for achieving high efficiency, long‐term stability, and low‐cost perovskite photovoltaic technologies toward ...
Zheng Wu   +7 more
wiley   +1 more source

Highly congested spiro-compounds via photoredox-mediated dearomative annulation cascade. [PDF]

open access: yesCommun Chem, 2022
Zhou C   +4 more
europepmc   +1 more source

Resonance Raman Spectroscopy of the Oxygenated Intermediates of Human CYP19A1 Implicates a Compound I Intermediate in the Final Lyase Step [PDF]

open access: yes, 2014
CYP19A1, or aromatase, a cytochrome P450 responsible for estrogen biosynthesis in humans, is an important therapeutic target for the treatment of breast cancer.
Kincaid, James R.   +3 more
core   +2 more sources

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