PMID- 27769417
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180123
LR  - 20180123
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 161
DP  - 2016 Dec 1
TI  - Fabrication of cross-linked hydrazone covalent organic frameworks by click 
      chemistry and application to solid phase microextraction.
PG  - 350-358
LID - S0039-9140(16)30622-1 [pii]
LID - 10.1016/j.talanta.2016.08.041 [doi]
AB  - Covalent organic frameworks (COFs) are an emerging class of porous organic 
      frameworks with diverse promising applications. Herein, we presented the first 
      example of cross-linked hydrazone COFs (cross-linked COFs) coating via thiol-ene 
      click chemistry for solid phase microextraction (SPME). Strong covalent bonds and 
      interlayer of the prepared networks ensured the adsorption capacity and 
      durability of the novel SPME fiber. pi-pi conjugated structure existed because of 
      abundant phenyl rings and -C=N groups in the cross-lined COFs. A series of 
      characterizations indicated that the cross-linked COFs possessed large surface 
      areas, high porosities and stabilities as well as hydrophobicities. The fiber was 
      applied to SPME of pesticide residues coupled with gas chromatography with an 
      electron capture detector (GC-ECD). Under the optimum experimental conditions, 
      enhancement factors in the range of 2190-10,998 were obtained, illustrating that 
      the cross-linked COFs possessed remarkable preconcentration ability. The low 
      detection limits of 0.0003-0.0023ngkg(-1) were achieved with relative standard 
      deviations (RSDs) in the range of 3.4-7.6% (intra-batch) and 5.7-11.6% 
      (inter-batch), respectively. Recovery values in the range of 78.2-107.0% were 
      obtained when the SPME-GC method was applied to the analysis of pesticides in 
      cucumber samples.
CI  - Copyright (c) 2016 Elsevier B.V. All rights reserved.
FAU - Wu, Mingxue
AU  - Wu M
AD  - College of Chemistry, Jilin University, Changchun, 130012 China.
FAU - Chen, Gang
AU  - Chen G
AD  - College of Chemistry, Jilin University, Changchun, 130012 China.
FAU - Ma, Jiutong
AU  - Ma J
AD  - College of Chemistry, Jilin University, Changchun, 130012 China.
FAU - Liu, Ping
AU  - Liu P
AD  - Changchun GeneScience Pharmaceuticals Co., Ltd., Changchun, 130012 China.
FAU - Jia, Qiong
AU  - Jia Q
AD  - College of Chemistry, Jilin University, Changchun, 130012 China. Electronic 
      address: jiaqiong@jlu.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20160816
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
OTO - NOTNLM
OT  - Click chemistry
OT  - Cross-linked hydrazone covalent organic frameworks
OT  - Solid phase microextraction
EDAT- 2016/10/23 06:00
MHDA- 2016/10/23 06:01
CRDT- 2016/10/23 06:00
PHST- 2016/06/23 00:00 [received]
PHST- 2016/08/02 00:00 [revised]
PHST- 2016/08/16 00:00 [accepted]
PHST- 2016/10/23 06:00 [pubmed]
PHST- 2016/10/23 06:01 [medline]
PHST- 2016/10/23 06:00 [entrez]
AID - S0039-9140(16)30622-1 [pii]
AID - 10.1016/j.talanta.2016.08.041 [doi]
PST - ppublish
SO  - Talanta. 2016 Dec 1;161:350-358. doi: 10.1016/j.talanta.2016.08.041. Epub 2016 
      Aug 16.