13
C-NMR
(CDCl
3
, 125 MHz) δ (ppm): 162,48 (2 CH=N); 159,89 (2
C-OH); 142,18; 133,28; 131,27; 128,24; 123,68; 119,91;
119,62; 119,19 (16 C
Ar
). IR (KBr) (cm
-1
): 3052 (ν, C-H),
2555 (ν, O-H), 1613 (ν, C=N), 1566, 1476 (ν, C=C), 1274
Efficient synthesis
and photophysical properties
of some salophens to produce
optical chemosensors for the
analysis of transition metal ions
Quang Trung Nguyen
*
, Thi Phuong Nam Pham,
Duc Loi Vu, Van Tuyen Nguyen
Institute of Chemistry, Vietnam Academy of Science and Technology
Received 12 October 2018; accepted 29 November 2018
Abstract:
Salen-type Schiff base ligands with big π-conjugated
systems usually exhibit strong UV-Vis absorption
and fluorescence with or without metal ions, and
there are many reports on the salen-type optical
chemosensors for the analysis of metal ions, such as
Zn
2+
, Cu
2+
, Hg
2+
. In this study, salophen-type ligands
derived from 1,2-phenylenediamine and 5-substituted
salicylaldehydes were prepared efficiently using
ultrasounds. These ligands were characterised by
specific spectroscopies including NMR, IR and ESI-MS,
and their photophysical properties of UV-Vis absorption
and fluorescence were determined as well. The salophen
ligands can be used as highly selective and sensitive
chemosensors for the detection of some transition metal
ions such as Hg
2+
, Cu
2+
, Zn
2+
hopefully.
Keywords: derivatives, photophysical properties,
Chia sẻ với bạn bè của bạn: |
