Quinoxaline-based chromogenic and fluorogenic chemosensors for the detection of metal cations

Investigation on the Synthesis, Application and Structural Features of Heteroaryl 1,2-Diketones

“…9−11 By using different heteroaryl substrates, appealing molecular entities can be readily prepared and utilized in many applications, for example pharmaceutical reagents, catalytic ligands and chemical sensors. 12 During our previous research using acetophenone 1a and 3iodopyridine 2a to form heteroarylation product 3a, 13,14 an unexpected heteroaryl 1,2-diketone structure 4a was observed (Scheme 2). The structure of this diketone 4a was confirmed by 13 C NMR (193.0 and 192.8 ppm for carbonyl carbons) and High Resolution Mass Spectroscopy.…”

“… 9 − 11 By using different heteroaryl substrates, appealing molecular entities can be readily prepared and utilized in many applications, for example pharmaceutical reagents, catalytic ligands and chemical sensors. 12 …”

“… Additionally, 1,2-diketones have demonstrated some uncommon yet interesting reactions including addition/oxy Cope rearrangement to make 1,6-diketones, and condensation with 1,3-diphenylacetone to make tetraphenylcyclopentadienone (Scheme ). − By using different heteroaryl substrates, appealing molecular entities can be readily prepared and utilized in many applications, for example pharmaceutical reagents, catalytic ligands and chemical sensors …”

Effect of the Chloro-Substitution on Electrochemical and Optical Properties of New Carbazole Dyes

“…The rapid development of work on this class of compounds has shown that they are characterized by excellent photo-conductivity with high luminescent efficiency. The displayed fluorescent properties make this class of compounds a molecular element of many compounds used for the production of dyes [ 4 , 5 , 6 ], polymers [ 7 , 8 , 9 ], or electroluminescent materials [ 10 , 11 , 12 , 13 , 14 ] and are applicable as organic light emitting diodes (OLEDs) [ 15 , 16 , 17 , 18 , 19 ], thin film transistors, photorefractive materials [ 20 ], and sensors [ 21 , 22 ]. Carbazole derivatives are also a building block of the D-A conjugated polymers used in the nonlinear optical maters.…”

Quinoxaline-annelated hexadehydro[12]annulene: use of a new building block to construct a hydrogen-bonded hexagonal molecular network

“…The present study involved a quinoxaline-annelated hexadehydro[12]annulene derivative, because the incorporation of azaacenes, such as quinoxaline, into π-conjugated systems can provide finely tuned frontier orbital levels, 13 cation responsiveness, 14 and an environmentally responsive photophysical nature. 15 The quinoxaline-annelated [12]DBA derivative ( TQ12 ) with peripheral six carboxyphenyl groups shown in Fig.…”