Results 61 to 70 of about 44,738 (325)
A Mechanical Planar Chiral Rotaxane Induces Single‐Handed Helicity in a Twisted Perylene Diimide
Angewandte Chemie, EarlyView.A mechanical planar chiral rotaxane (Rmp) is used to induce single‐handed helical chirality (M) in a perylene diimide chromophore, resulting in persistent circular dichroism (CD) and circularly polarised luminescence (CPL). ABSTRACT The twisting of chromophores such as perylene diimides (PDIs) into helical structures affords chiroptical properties from
Thomas E. Lawson +5 more
wiley +2 more sources
, 2016 A concise gold-catalyzed method for the preparation of anthracenes from o-alkynyldiarylmethanes has been developed. Under mild reaction conditions, versatile anthracene derivatives were formed in moderate to good yields.
Long-Wu Ye (1507885) +3 more
core +1 more source
B-N Lewis pair-functionalized anthracenes
, 2020 The functionalization of π-conjugated polycyclic aromatic hydrocarbons (PAHs) with main group elements (i.e., B, Si, P) has been a topic of intense interest over the past several years.
core +1 more source
Chiral Morphing of Liquid Crystal Polymer Networks
Advanced Science, EarlyView.This paper reviews how macroscopic chirality spontaneously arises from liquid crystal polymer materials. It describes how alignment is utilized to create the mechanical anisotropy, geometric misorientation and asymmetry that leads to chiral shape morphing, how shape selection between helicoids and helices arises, the techniques used to prepare these ...
Laurens T. de Haan
wiley +1 more source
A Theoretical Approach to Relate the Reactivity Descriptors and Mulliken Charges with Carcinogenity of Some Methylated Benzo[a]Anthracene [PDF]
Pakistan Journal of Analytical & Environmental Chemistry, 2012 Quantum chemical calculations were carried out to explain how the electronic state and reactivity indices of some methylated benzo [a] anthracenes vary with position and number of methyl substituent in molecules. The global reactivity descriptors such as
Mahmoud S. Said, Zaheda A. Najim
doaj
Advanced Science, EarlyView.Upon UV irradiation, flexible and tough hydrogels are formed rapidly (>0.5 s) from dilute (>0.5 wt%) solutions of o‐ethylnitrobenzene–modified PVA. At ∼1.5 wt%, the hydrogels withstand up to 10 MPa compression, remain handleable even after 200‐fold swelling.
Masaaki Okihara +4 more
wiley +1 more source
Angewandte Chemie, EarlyView.Peptide‐to‐Small Molecule Paradigm: Peptidomimetics have evolved from simple mimicry toward drug‐like scaffolds supported by increasing clinical successes. This Perspective highlights the geometric design principles—linear repetition, convergent fusion, and cyclization—defining the next‐generation peptidomimetic architectures capable of targeting ...
Jesang Lee +5 more
wiley +2 more sources
Frontiers in Chemistry, 2023 Ethnopharmacological relevance: Therapeutic botanicals (plants and derivatives) are in use since antiquity for various health ailments. The ethnic community is the repository of the information, the multifactorial therapeutic applications of which may ...
Sarita Das +7 more
doaj +1 more source
Mechanochemical Activation of a Bridged‐Exciplex Optical Force Probe
Advanced Science, EarlyView.A bridged‐exciplex optical force probe is synthesized, switching from solvatochromic charge‐transfer emission in the latent state to intense locally excited emission upon activation. This dual photophysical response with additional changes in quantum yield and fluorescence lifetime enables precise environmental sensing and distinct optical readouts ...
Ronja Schumann +8 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2008 When 9,10-dibromoanthracene was treated with bromine in CCl4 without a catalyst, 1,2,3,4,9,10-hexabromo-1,2,3,4-tetrahydroanthracene (3) was obtained in 95% yield in the absence of other stereoisomers or rearomatization products. We investigated the base-
Osman Cakmak +4 more
doaj +1 more source