Results 81 to 90 of about 2,334 (173)

Highly Efficient Synthesis of 1-Thioamidoalkyl-2-naphthols and 14-Aryl-14H-dibenzo[a,j]xanthenes using a Novel Ionic Liquid: Catalyst Preparation, Characterization and Performing the Reactions

open access: yesBulletin of Chemical Reaction Engineering & Catalysis, 2018
In this work, a novel Brønsted acidic ionic liquid namely triethylaminium-N-sulfonic acid trifluoroacetate {[TEASA][TFA]} has been synthesized by the reaction of NEt3 with ClSO3H, and then with CF3CO2H. The ionic liquid has been characterized by studying
Atefeh Saadat   +3 more
doaj   +1 more source

Fluorenone and Fluorenemalononitrile‐Tethered Conjugated Microporous Polymers for Efficient CO2 Uptake and Rhodamine B Removal

open access: yesMacromolecular Rapid Communications, EarlyView.
TPET‐F2CN CMP exhibited higher CO2 uptake (2.88 mmol g−1 at 273 K) and superior Rhd B adsorption, with an equilibrium capacity of 98.12 mg g−1 and a maximum monolayer capacity of 155.6 mg g−1. ABSTRACT Herein, two conjugated microporous polymers (CMPs), TPET‐FO and TPET‐F2CN, are functionalized with carbonyl and nitrile groups.
Mohamed Gamal Mohamed   +8 more
wiley   +1 more source

Comparison among Different pH Values of Rhodamine B Solution Impregnated into Mesoporous Silica

open access: yesOrbital: The Electronic Journal of Chemistry, 2013
We studied the behavior of different pH values of Rhodamine B solution impregnated into pores of mesoporous silica, through structural characterization techniques, such as scanning electron microscopy and porosity measurements, and spectroscopic ...
Juliana Jorge   +2 more
doaj   +1 more source

Reactivity of Oxidized Porous Silicon with Calcium Ion in Aqueous Media: Stability, pH Behavior, and Host‐Guest Strategies

open access: yesSmall, EarlyView.
Oxidized porous silicon, composed of an elemental silicon porous skeleton coated with a silica shell, reacts with aqueous Ca2+ to generate a mixed silica–calcium silicate matrix that is remarkably efficient at trapping small molecules. With an emphasis on the engineering of controlled‐release drug delivery systems, this study identifies the factors ...
Ruhan Fan   +2 more
wiley   +1 more source

Efficient, one-pot synthesis of 14-aryl-14Hdibenzo[a, j]xanthenes in aqueous medium catalyzed by bis-piperidinium compounds [PDF]

open access: yes, 2013
A novel procedure for the synthesis of 14-aryl-14Hdibenzo[a,j]xanthenes through one-pot condensation of b-naphthol with aryl halides in aqueous media catalyzed by bis-piperidinium compounds is described. The method resulted in good to excellent yields in
Ali Shahid Chatha, Shehzad   +3 more
core  

Cascade Nucleophilic Addition−Cyclic Michael Addition of Arynes and Phenols/Anilines Bearing Ortho α,β-Unsaturated Groups: Facile Synthesis of 9-Functionalized Xanthenes/Acridines

open access: yes, 2016
A facile synthesis of xanthenes and acridines based on a cascade nucleophilic addition−cyclic Michael addition process of arynes and phenols/anilines substituted with α,β-unsaturated groups at the ortho positions is described.
Xian Huang (820390)   +1 more
core   +1 more source

Fluorescence Sensing of Anions Like Adenosine 5ʹ‐Triphosphate With pH‐Gated Porous Dye‐Loaded Cerasomes

open access: yesSmall, EarlyView.
The development of gated systems enabling controlled pore opening offers new opportunities for sensing applications. This study explores dye loading in porous and non‐porous cerasomes and pH‐dependent ATP‐triggered gating via polyamine anchors. Porous cerasomes were synthesized using block‐co‐polymers, enabling controlled proton influx and fluorescence‐
Romane Vinot   +4 more
wiley   +1 more source

Friedel-Crafts acetylation and benzoylation of benzylsilanes and xanthenes

open access: yes, 2002
The synthesis of p-acetyl and p-benzoyl derivatives of various benzylsilanes (p-(RCO)-C-1-C6H4-(CRR3)-R-2-SiMe3: R-1, R-2, R-3=Me, H, H; Me, H, Ph; Me, H, Me; Me, Me, Me; Ph, H, H; Ph, H, Ph; Ph, H, Me; Ph, Me, Me), xanthenes (3-benzoyl and 3,6-dibenzoyl)
Triantafyllou, A. S.   +4 more
core  

Programmable Chirality Transfer: Seeding‐Directed Co‐Assembly of Functional Molecules With Amyloid Frameworks

open access: yesSmall, EarlyView.
Seeding‐directed co‐assembly enables efficient chirality transfer from chiral amyloid scaffold to achiral functional molecules. Controlled assembly pathways result in hierarchical hybrid supramolecular structures showing enhanced induced electronic circular dichroism (IECD) and/or vibrational circular dichroism (IVCD).
Aleksandra Kołodziejczyk   +3 more
wiley   +1 more source

White light emitting molecular logic gates

open access: yesSmart Molecules, EarlyView.
White light emitting smart molecules with Boolean logic computing ability are surveyed. Abstract White light emitting (WLE) materials are of considerable interest with commercial and societal applications in video displays and lighting devices. A characteristic property of WLE materials is the luminescence profile spanning from 380 to 700 nm.
Davide Benedetto Tiz   +2 more
wiley   +1 more source

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