Through space charge-transfer emission in lambda (Λ)-shaped triarylboranes and the use in fluorescent sensing for fluoride and cyanide ions

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 45668-45678 ◽  
Author(s):  
He Xi ◽  
Yang Liu ◽  
Chun-Xue Yuan ◽  
Ye-Xin Li ◽  
Lei Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Space Charge ◽  
Fluorescent Sensors ◽  
Organoboron Compounds ◽  
Fluorescent Sensing ◽  
Efficient Strategy ◽  
New Class

By introducing a twisted and non-conjugated Λ-shaped TB scaffold to triarylboranes, we provide an efficient strategy to develop a new class of organoboron compounds applied as colorimetric and ratiometric fluorescent sensors for fluoride and cyanide.

Tuning the Through-Space Charge Transfer Emission in Triarylborane and Triarylamine Functionalized Dipeptide Organogels

Soft Matter ◽  
2022 ◽  
Author(s):  
Yu Wang ◽  
Bowen Wang ◽  
Kanglei Liu ◽  
Xiaodong Yin ◽  
Pangkuan Chen ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Space Charge ◽  
New Class

We report herein a new class of either carbazolyl or BMes2 (Mes = mesityl) group functionalized Boc-Lys(Z)-Phe-OMe (Z = carbobenzyloxy) dipeptides—Boc-Lys(Z)-Phe-C5-carbazolyl (N2) and Boc-Lys(Z)-Phe-C6-BMes2 (B2). Both of the compounds are...

scholarly journals Tuning π-Acceptor/σ-Donor Ratio of the 2-Isocyanoazulene Ligand: Non-Fluorinated Rival of Pentafluorophenyl Isocyanide and Trifluorovinyl Isocyanide Discovered

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 981
Author(s):  
Mason D. Hart ◽  
John J. Meyers ◽  
Zachary A. Wood ◽  
Toshinori Nakakita ◽  
Jason C. Applegate ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Coordination Chemistry ◽  
Single Crystal ◽  
13C Nmr ◽  
Quantitative Assessment ◽  
X Ray ◽  
New Class ◽  
Linear Relationships ◽  
Ligand Charge Transfer ◽  
Donor Characteristics

Isocyanoazulenes (CNAz) constitute a relatively new class of isocyanoarenes that offers rich structural and electronic diversification of the organic isocyanide ligand platform. This article considers a series of 2-isocyano-1,3-X2-azulene ligands (X = H, Me, CO2Et, Br, and CN) and the corresponding zero-valent complexes thereof, [(OC)5Cr(2-isocyano-1,3-X2-azulene)]. Air- and thermally stable, X-ray structurally characterized 2-isocyano-1,3-dimethylazulene may be viewed as a non-benzenoid aromatic congener of 2,6-dimethyphenyl isocyanide (2,6-xylyl isocyanide), a longtime “workhorse” aryl isocyanide ligand in coordination chemistry. Single crystal X-ray crystallographic {Cr–CNAz bond distances}, cyclic voltametric {E1/2(Cr0/1+)}, 13C NMR {δ(13CN), δ(13CO)}, UV-vis {dπ(Cr) → pπ*(CNAz) Metal-to-Ligand Charge Transfer}, and FTIR {νN≡C, νC≡O, kC≡O} analyses of the [(OC)5Cr(2-isocyano-1,3-X2-azulene)] complexes provided a multifaceted, quantitative assessment of the π-acceptor/σ-donor characteristics of the above five 2-isocyanoazulenes. In particular, the following inverse linear relationships were documented: δ(13COtrans) vs. δ(13CN), δ(13COcis) vs. δ(13CN), and δ(13COtrans) vs. kC≡O,trans force constant. Remarkably, the net electron withdrawing capability of the 2-isocyano-1,3-dicyanoazulene ligand rivals those of perfluorinated isocyanides CNC6F5 and CNC2F3.

scholarly journals Cu/Pd-catalyzed borocarbonylative trifunctionalization of alkynes and allenes: synthesis of β-geminal-diboryl ketones

2021 ◽  
Author(s):  
Yang Yuan ◽  
Fu-Peng Wu ◽  
Anke Spannenberg ◽  
Xiao-Feng Wu
Keyword(s):  
Organic Synthesis ◽  
Functional Group ◽  
Building Blocks ◽  
Mechanistic Studies ◽  
Efficient Strategy ◽  
New Class ◽  
Reaction Proceeds

AbstractFunctionalized bisboryl compounds have recently emerged as a new class of synthetically useful building blocks in organic synthesis. Herein, we report an efficient strategy to synthesize β-geminal-diboryl ketones enabled by a Cu/Pd-catalyzed borocarbonylative trifunctionalization of readily available alkynes and allenes. This reaction promises to be a useful method for the synthesis of functionalized β-geminal-diboryl ketones with broad functional group tolerance. Mechanistic studies suggest that the reaction proceeds through borocarbonylation/hydroboration cascade of both alkynes and allenes.

Two Schiff base ligands for distinguishing ZnII/CdII sensing—effect of substituent on fluorescent sensing

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27682-27689 ◽  
Author(s):  
Zhi-Peng Zheng ◽  
Qin Wei ◽  
Wen-Xia Yin ◽  
Lin-Tao Wan ◽  
Xia Huang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Fluorescent Sensors ◽  
Schiff Base Ligands ◽  
Fluorescent Sensing ◽  
Ethoxyl Group

Two Schiff base ligands (HL1, HL2) were synthesized as fluorescent sensors for Zn2+ or Cd2+. With an ethoxyl group, HL1 can distinguishingly sense Zn2+ and Cd2+, while HL2 exclusively responds to Zn2+.

Sign in / Sign up

Export Citation Format

Share Document