Amidofluorene-appended lower rim 1,3-diconjugate of calix[4]arene: synthesis, characterization and highly selective sensor for Cu²⁺

• Rahman Hosseinzadeh,
• Mohammad Nemati,
• Reza Zadmard and
• Maryam Mohadjerani

Beilstein J. Org. Chem. 2016, 12, 1749–1757, doi:10.3762/bjoc.12.163

• supramolecular structures, especially calixarene derivatives, has been an appealing field for research [14]. Calixarene has been considered as an effective molecular scaffold in the improvement of fluorescent and chromogenic sensors, especially for metal-ion recognition [14][15]. Calix[4]arene derivatives having

Anthracene coupled adenine for the selective sensing of copper ions

• Kumaresh Ghosh and
• Tanushree Sen

Beilstein J. Org. Chem. 2010, 6, No. 44, doi:10.3762/bjoc.6.44

• Kumaresh Ghosh Tanushree Sen Department of Chemistry, University of Kalyani, Kalyani-741235, India 10.3762/bjoc.6.44 Abstract Anthracene-based adenines 1 and 2 have been designed and synthesized, and their metal ion recognition properties have been established fluorometrically. Both molecules

• selective; fluorescence; metal ion recognition; PET sensory systems; Introduction Fluorescent chemosensors for the detection of biologically relevant metal ions have been widely exploited in the field of supramolecular chemistry [1][2][3][4]. Among the various transition metal ions, the copper ion draws

• the WC sites are marginally increased (Figure 2). Fluorescence and UV–vis spectroscopic techniques were then employed to ascertain the metal ion recognition properties of both 1 and 2 in solution. Receptor 1 (c = 5.09 × 10−5 M) upon excitation at 348 nm in CH3CN containing 0.02% DMSO showed structured