2387-03-3Relevant articles and documents
Multistimuli-Responsive Luminescence of Naphthalazine Based on Aggregation-Induced Emission
Yao, Xiang,Ru, Jia-Xi,Xu, Cong,Liu, Ya-Ming,Dou, Wei,Tang, Xiao-Liang,Zhang, Guo-Lin,Liu, Wei-Sheng
, p. 478 - 482 (2015)
Stimuli-responsive luminescent materials, which are dependent on changes in physical molecular packing modes, have attracted more and more interest over the past ten years. In this study, 2,2-dihydroxy-1,1-naphthalazine was synthesized and shown to exhibit different fluorescence emission in solution and solid states with characteristic aggregation-induced emission (AIE) properties. A remarkable change in the fluorescence of 2,2-dihydroxy-1,1-naphthalazine occurred upon mechanical grinding, heating, or exposure to solvents. According to the characterization by solid-state fluorescence spectroscopy, X-ray crystallography, differential scanning calorimetry, and X-ray powder diffraction, the fluorescence change could be attributed to transitions between two structurally different polymorphs. These significant properties could also give 2,2-dihydroxy-1,1-naphthalazine more potential applications as a multifunctional material.
Structure and electronics in dimeric boron π expanded azine and salphen complexes
Crandall, Laura A.,Dawadi, Mahesh B.,Burrell, Tailon,Odoom, Adwoa,Ziegler, Christopher J.
, p. 627 - 632 (2017)
Although boron-based fluorophores incorporating nitrogenous chelating ligands have received much attention, there has been little work on examples of boron-salphen and azine derivatives. In this report, we present several π expanded boron salphen type complexes, incorporating both bis(2-hydroxynaphthaldehyde)azine as well as ortho, meta and para variants of the analogous 2-hydroxynaphthaldehyde salphen compounds. For the azine, we observed only the formation of a single BF2 adduct, while for the naphth-phen compounds dimeric BF2 binding was observed. All new compounds were fully characterized via X-ray diffraction, and both DFT and TDDFT studies were carried out to probe the electronic structures of these fluorophores.
A single probe for sensing both acetate and aluminum(iii): Visible region detection, red fluorescence and human breast cancer cell imaging
Ghosh, Abhijit,Sengupta, Archya,Chattopadhyay, Ansuman,Das, Debasis
, p. 24194 - 24199 (2015)
A single probe (L) can recognise both AcO- and Al3+ as prepared by coupling 2-hydroxy-1-naphthaldehyde with hydrazine. Both the ions provide visible range emission and absorbance upon interaction with the probe allowing their naked eye detections. AcO- sensing is attributed to the formation of hydrogen-bond while Al3+ recognition is due to the combination of three effects, viz. inhibition of excited-state proton transfer (ESPT), CHN isomerization and chelation-enhanced fluorescence (CHEF).
Efficient and versatile catalysis for β-alkylation of secondary alcohols through hydrogen auto transfer process with newly designed ruthenium(II) complexes containing ON donor aldazine ligands
Premkumar, Periyasamy,Manikandan, Rajendran,Nirmala, Muthukumaran,Viswanathamurthi, Periasamy,Malecki, Jan Grzegorz
, p. 3065 - 3079 (2017/10/11)
A new series of ruthenium(II) carbonyl complexes, [RuCl(CO)(EPh3)2(L1-2)] (1–4) (E?=?P or As; H2L1?=?salicylaldazine, H2L2?=?2-hydroxynaphthaldazine), have been assembled from ruthenium(II) precursors [RuHCl(CO)(EPh3)3] and bidentate ON donor Schiff base ligands (H2L1-2). Both ligands and their new ruthenium(II) complexes have been characterized by elemental analyses, spectroscopic methods (UV, IR, NMR (1H, 13C, 31P) as well as ESI mass spectrometry. The molecular structures of H2L1 and 1 have been confirmed by single crystal X-ray diffraction. Based on the above studies, an octahedral coordination geometry around the metal center has been proposed for 1–4. To investigate the catalytic effectiveness of 1–4, the complexes have been used as catalysts in β-alkylation of secondary alcohols with primary alcohols and synthesis of quinolines. The effect of solvent, time, base, catalyst loading, and substituent of the ligand moiety on the reaction was studied. Notably, 1 was a more efficient catalyst toward alkylation of a wide range of alcohols and quinolines synthesis. The reusability of the catalyst was checked and the results showed up to six catalytic runs without significant loss of activity.
