Intermolecular amine-phenol interactions are largely recognized as unique models with diverse supramolecular interactions. However, fluorescence (FL) variations originating from such rare. Herein, FL changes well realized to identify an important biomarker, biogenic amines (BAs). A simple, inexpensive, and thermally stable anthracenylphosphonate is linked 2,2'-biphenol design a functional dual-state emitter. Among the various tested, this emitter displays superior sensitivity lowest possible...

Maintaining the freshness of food is essential for a healthy and quality life. Nevertheless, it remains global challenge. Hence, an easy detection monitoring protocol would be highly desirable. A cyanoacrylic acid (CAA)-based fluorophore manifested as reusable platform that responds diversely against different concentrations selective aliphatic biogenic amines (BAs) in both solution vapor phases. Slow spoilage protein-rich progressively monitored through emission shifts visible to naked eye....

Surfactants’ hydrophobicity controls the growth of lanthanum sulfide nanospheres in a water-in-oil microemulsion.

Coupling reactions of allenylphosphonates (OCH2CMe2CH2O)P(O)CHCCRR' [R, R' = H (1a), R H, Me (1b), (1c)] with aryl iodides, iodophenol, and iodobenzoic acid in the presence palladium(II) acetate are investigated compared those phenylallenes PhCHCCR2 [R (2a), (2b)] allenyl esters EtO2CCHCCR2 (2c), (2d)]. While 1b 1c couple different stereochemical outcomes using PhI Pd(OAc)2/PPh3/K2CO3 to give phenyl-substituted 1,3-butadienes, 1a does not undergo coupling but isomerizes acetylene...

Easily reachable electron-poor/rich primary and secondary benzylic phosphates are suitably used as substrates for Friedel-Crafts benzylation reactions with only 1.2 equiv activated/deactivated arenes (no additional solvent) to access structurally electronically diverse polyarylated alkanes excellent yields selectivities at room temperature. Specifically, diversely substituted di/triarylmethanes generated within 2-30 min using this approach. A wide number of electron-poor easily accomplished...

Promising research on AIEgen (aggregation-induced emission active fluorogens)-based sensors for the detection of explosives (mostly picric acid) is primarily dominated by polymeric molecules. However, herein, we report ability a recently developed anthracene-based electron-rich π-conjugate as small and suitable selective sensitive 2,4,6-trinitrotoluene (TNT) through fluorescence (PL) quenching. This fluorophore consists trimethoxybenzene-linked anthranyl-π-phenothiazine, which recognized...

Organic fluorogens with the solution and solid-state emissive features appeal dramatically due to their unique photophysical properties wide applications in bioimaging, sensing, optoelectronic devices. However, a well-defined design strategy has yet be progressed produce such fluorogens. With recently detected needs, we herein develop an easily affordable doubly twisted thermally stable organophosphonate as first emitter both solid states high-contrast mechanofluorochromism ubiquitous...

N-hexylindole-linked anthracenyl twisted π-conjugates are identified as AIE-active DSEgens, which can inhibit FaDu and 4T1 cell lines but not HEK-293. The scathed fluorescence signals for make them recognizable over

In quest of a new working design for photostable lipid-droplets (LDs) bioimaging probe, we herein unveil and demonstrate twisted donor(naphthalene)-π-acceptor(dicyano) architecture linked with oxo/thioether functionality, where the probes' emission, hydrophobicity, cytotoxicity, cell permeability are altered by replacing present chalcogen/s. this class molecules, an "oxanthrene"-based compound, "OXNCN", was realized as noncytotoxic cell-permeable displaying intense fluorescence in nonpolar...

Abstract The strong electrophilicity of arylpyrylium salts was recognized for the colorimetric detection vital amine analytes, limited to ammonia or methylamines and putrescine as biogenic amine. This report presents conformationally twisted, electrophilic triphenylamine-linked 2,4,6-tristyryl pyrylium salt PyTPA a single dye sense various aliphatic/aromatic amines, nicotine, guanidine rapidly in nanomolar concentrations. unexplored styrylpyrylium design offers specific electronic...

In this report, a structurally unique phenothiazine (PTZ) core is linked with glutamic acid-based dendrons through solid-phase peptide synthesis approach to access variety of PTZ-linked conveniently. Inferior cytotoxicity anionic surface-linked second-generation would be more desirable for various applications than respective lysine-based dendrons. Solid-phase novel class molecules. These newly synthesized were screened as an inhibitor against the main protease (M pro ) enzyme, proposed best...

Abstract The synthesis of new pyrazoles and triazoles, with or without phosphorus substituents, from allenylphosphonates is described. Thus, Ph 3 P‐promoted reactions the (OCH 2 CMe CH O)P(O)CH=C=CRR′ [R = H, R′ Me ( 1b ), R 1c )] DIAD/DEAD lead to phosphonopyrazoles by utilizing –CO functionality for cyclization. products derived an α‐phenyl group undergo unusual but facile P–C bond cleavage form tetrasubstituted pyrazoles. In second type reaction, SiN reacts phosphono‐1,2,3‐triazoles in CN...

Abstract Regioselective, palladium‐catalyzed coupling reactions of allenylphosphonates (OCH 2 CMe CH O)P(O)CH=C=CRR′ [R, R′ = H ( 1a ), R H, Me 1b 1c )] and phenyl allenes PhCH=C=CR [R 2a 2b with functionalized iodophenols (in PEG‐400), 2‐iodobenzoic acid, 2‐iodobenzyl alcohol are investigated. Benzofurans free aldehyde functionalities formed in high yields 1 H/ 31 P NMR) by using iodophenols, essentially as single isomers. The synthetic potential these products possessing an functionality...

Abstract A kinetic model has been presented to explain the growth of microorganism on solid hydrocarbons. The is based assumption that metabolite produced by growing cells helps dissolution substrate in aqueous medium. linear behavior curve predicted verified experimentally.

Cycloaddition reactions of allenylphosphonates [(RO)(2)P(O)[(R(1))C═C═CR(2)(2)] with dialkyl acetylenedicarboxylates, 1,3-diphenylisobenzofuran, and anthracene have been investigated compared those allenoates [(EtO(2)C)RC═C═CH(2)] allenylphosphine oxides [Ph(2)P(O)(R(1))C═C═CR(2)(2)] in selected cases. Allenylphosphonates (RO)(2)P(O)(Ar)C═C═CH(2) an α-aryl group preferentially undergo [4 + 2] cycloaddition DMAD/DEAD under thermal activation, but addition to the expected 1:1 (allene: DMAD)...

Steady development on photophysical behaviors for a variety of organic fluorophores inspired us to generate anthracene-based fluorescent molecules with strong acceptor and significantly weak donor through π-spacer. Such are found have substantial twisted conformational orientations in the solid state enhanced apolar character because attachment tolyl or mesityl group an anthracenyl core. Upon exposure solvents, solvatochromism was noticed 4-nitro compound (84 nm red shift) contrast cyano...