Influence of the spacer in bis-porphyrinic tweezers on the association constant for host/guest complexes

2005 ◽  
Vol 09 (11) ◽  
pp. 779-787 ◽  
Author(s):  
Nathalie Solladié ◽  
Souhaila Bouatra ◽  
Sonja Merkas ◽  
Régis Rein ◽  
Jéröme Roeser

Detailed complexation studies of two rigid tweezers bearing mono- or tris-anthracenic spacers is reported, along with the synthesis and characterization of two new tweezers bearing flexible nucleosidic linkers. For flexible tweezers bearing the two porphyrins at O -5' and O -3' positions of the ribose, the association constant for the complexation of DABCO increases, when compared to the association constant for the same base with a reference mono-porphyrin. The nucleoside seems to confer sufficient preorganization to this dimer to enhance the binding constant, documenting the fact that rigid dimers are not necessary for preorganization, and opening new routes to the rapid synthesis of flexible tweezers capable of complexing guests with high association constants.

2015 ◽  
Vol 775 ◽  
pp. 143-146
Author(s):  
Ming Kwen Tsai ◽  
Yueh Chien Lee ◽  
Chia Chih Huang ◽  
Sheng Yao Hu ◽  
Kwong Kau Tiong ◽  
...  

In this work, the CuInS2 nanoparticles are successfully synthesized by microwave-assisted heating technique and further calcined at 400 °C. The morphological, structural, and optical properties of the synthesized CuInS2 nanoparticles are investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), Raman scattering, and transmittance measurement, respectively. The SEM image shows the clear particle shape of the calcined CuInS2 nanoparticles. After calcination treatment, the fundamental (112) peak of the XRD spectrum and a broad Raman peak mixed with chalcopyrite and CuAu structures support the improved crystallinity of the calcined CuInS2 nanoparticles.


2008 ◽  
Vol 62 (6-7) ◽  
pp. 929-931 ◽  
Author(s):  
Shivanand M. Pai ◽  
Bharat L. Newalkar ◽  
Nettem V. Choudary

2020 ◽  
Vol 259 ◽  
pp. 126873 ◽  
Author(s):  
Dayan Xie ◽  
Kuibao Zhang ◽  
Weiwei Li ◽  
Baozhu Luo ◽  
Haibin Zhang

Author(s):  
Viorel Trofim ◽  
Vasilii Cretu ◽  
Oleg Lupan ◽  
Mihai Enachi ◽  
Eduard Monaico ◽  
...  

2020 ◽  
Vol 27 (4) ◽  
pp. 1241-1251 ◽  
Author(s):  
Siqi Huang ◽  
Xiaoxu Wu ◽  
Zhi Li ◽  
Long Shi ◽  
Yan Zhang ◽  
...  

2015 ◽  
Vol 355 ◽  
pp. 726-735 ◽  
Author(s):  
Dinesh Veeran Ponnuvelu ◽  
Biji Pullithadathil ◽  
Arun K. Prasad ◽  
Sandip Dhara ◽  
Anuradha Ashok ◽  
...  

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