Results 71 to 80 of about 1,561 (166)

Synthesis and Characterization of Trivalent Cerium Complexes of p-tert-Butylcalix[4,6,8]Arenes: Effect of Organic Solvents

Journal of Chemistry, 2013
Reaction of Ce3+ with p-tert-butylcalix[n]arene (n=4,6,8) yields purple crystalline complexes structurally as [Ce(p-tert-butylcalix[4]arene-3H)2(NO3)(DMF)x](2 − x)DMF (1), [Ce(p-tert-butylcalix[6]arene-4H)2(NO3)(DMF)x](3 − x)DMF (2), and [Ce(p-tert ...
Md. Hasan Zahir
doaj   +1 more source

Ultrasonic studies of resorcinol in protic and aprotic solvents at 40°

, 2002
Department of Chemistry, Saurashtra University, Rajkot-360 005, India E-mail : shkundal ad1 @sanchernet.in Fax: 91-0281-78512177633 Manuscript received 27 November 2000, accepted 31 May 2001 Various acoustical parameters like adiabatic compressibility (Ks) specific impedance (Z), intermolecular free path (Lf), Rao's molar sound function (R ...
openaire   +2 more sources

Effects of organic solvents on the depth‐of‐cure determination of conventional and bulk‐fill resin composites

European Journal of Oral Sciences, EarlyView.
Abstract This study investigated the influence of organic solvents on the depth of cure (DOC) of resin composites. Two conventional (Filtek Universal [FU] and Beautifil II [BE]) and two bulk‐fill (Filtek One Bulk Fill [FO] and Beautifil‐Bulk [BB]) composites were evaluated.
Beatriz de Cássia Romano, Frederick Allen Rueggeberg, Jorge Soto‐Montero, Carolina Bosso Andre, Marcelo Giannini   +4 more
wiley   +1 more source

Solvatochromism of 5-(4-substituted arylazo)-4-phenyl-6-methyl-3-cyano-2-pyridones

Zaštita Materijala, 2018
Eight 5-(4-substituted arylazo)-4-phenyl-6-methyl-3-cyano-2-pyridones were synthesized by reaction of benzoylacetone and arendiazonium salt, followed by condensation with cyanoacetamide. Absorption spectra of all azo pyridone dyes were recorded in twelve
Gordana S. Ušćumlić, Bojan Đ. Božić   +1 more
doaj   +1 more source

Development of chalcones structure‐related to avobenzone: Photoprotection, photostability, and safety evaluation

Photochemistry and Photobiology, EarlyView.
Scaffold hopping strategy used to develop chalcones structure‐related to the avobenzone tautomer. Positive aspects of 2‐hydroxychalcones are highlighted. Abstract Chalcones are α,β‐unsaturated ketones with extended π‐conjugation, making them promising scaffolds for the development of organic UV filters.
Gabriela Zanella Marcon, Taíne de Bastos Brum, Nayara Fernanda Tokashike de Araujo, Gabriela Lascala Ramos, Bruna Cogo Borin, Ruth Barin, Aline Ferreira Ourique, André Passaglia Schuch, Andréa Inês Horn Adams, Lorena Rigo Gaspar Cordeiro, Letícia Cruz, Fernando Fumagalli   +11 more
wiley   +1 more source

Solvent-dependent complex reaction pathways of bromoform revealed by time-resolved X-ray solution scattering and X-ray transient absorption spectroscopy

Structural Dynamics, 2019
The photochemical reaction pathways of CHBr3 in solution were unveiled using two complementary X-ray techniques, time-resolved X-ray solution scattering (TRXSS) and X-ray transient absorption spectroscopy, in a wide temporal range from 100 ps to tens of ...
Qingyu Kong, Dmitry Khakhulin, Ilya A. Shkrob, Jae Hyuk Lee, Xiaoyi Zhang, Jeongho Kim, Kyung Hwan Kim, Junbeom Jo, Jungmin Kim, Jaedong Kang, Van-Thai Pham, Guy Jennings, Charles Kurtz, Rick Spence, Lin X. Chen, Michael Wulff, Hyotcherl Ihee   +16 more
doaj   +1 more source

Photocatalytic Synthesis and Palladium‐Catalyzed Functionalizations of Hydrofluoroolefin (HFO‐1234ze)‐Based Vinyl Iodides

Advanced Synthesis &Catalysis, Volume 368, Issue 18, 19 September 2026.
An inexpensive industrial refrigerant, HFO‐1234ze, is transformed into a versatile fluoroalkyl building block via a scalable, solvent‐free protocol. Utilizing the metal‐free photocatalyst 4CzIPN, efficient visible‐light‐induced radical addition to alkynes reveals distinct, substrate‐dependent stereoselectivities.
Bálint Varga, Péter Szalai, Klára Aradi, Bálint Nagy, András Kotschy, Zoltán Novák   +5 more
wiley   +1 more source

Solvatochromism in Solvent Mixtures: A Practical Solution for a Complex Problem

Liquids
Many reactions are carried out in solvent mixtures, mainly because of practical reasons. For example, E2 eliminations are favored over SN2 substitutions in aqueous organic solvents because the bases are desolvated.
Omar A. El Seoud, Shirley Possidonio, Naved I. Malek   +2 more
doaj   +1 more source

Static dielectric constant of some pure protic and aprotic solvents and for binary solvent mixtures

, 2006
Department of Chemistry, University of Kalyani, Kalyani-741 235. Nadia. West Bengal. India E-mail : drasit_guha@yahoo.co. in B. P. Poddar Institute of Management & Technology, Kolkata-700 052, India E-mail : drumil_rupa @yahoo.co.uk Manuscript received 6 December 2004, revised 21 September 2005, accepted 23 September 2005 The dielectric constant ...
A. Guha, Rupa Pal
openaire   +2 more sources

ULTRASONIC STUDIES OF ANTIPROTOZOAL DRUG IN PROTIC AND APROTIC SOLVENTS AT 308.15 K

Latin American Applied Research - An international journal, 2014
 Ultrasonic velocities and density of various concentrations (0.01 to 0.10M) of anti protozoal drog “Diloxanide Furoate” in methanol, dimethyl formamide and 1,4-dioxan have been measured at 308.15 K by using single crystal variable path ultrasonic interferometer operating at 2 MHz and pycnometer respectively.
S. BALUJA, A. KULSHRESTHA, M. BHATT
openaire   +2 more sources