Chromogenic calixarene sensors for amine detection

Nanocrystalline Ag from Supramolecular Stabilization of Metals in 4‐tert‐Butylcalix[4]arene Lattices

“…Samples were scanned over a 2q range of 5-608, with a scan rate of 0.028 s À1 and a count time of 1 s. The resulting diffraction patterns were manually indexed by using the predicted pattern from analogous SCXRD structures (corrected for appropriate wavelength) as a guide, along with the program Crystal Cracker [87] and the Powder 4.0 program suite. 13 C CP/MAS NMR spectra were collected with a Bruker AMX-300 spectrometer ( 1 H = 300.145, 13 C = 75.483 MHz) and a Doty 5-mm high-speed MAS probe. 13 C CP/MAS NMR spectra were collected with a Bruker AMX-300 spectrometer ( 1 H = 300.145, 13 C = 75.483 MHz) and a Doty 5-mm high-speed MAS probe.…”

“…Despite this, with the exception of recent studies on the gas-adsorption capabilities of the low-density apo form of 1, [9,10] the perceived low solubility and comparative simplicity of the inclusion compounds it forms have caused 1 to be overlooked as a potential building block for noncovalent assembly of functional materials. In other calix-A C H T U N G T R E N N U N G arene-based systems, the inclusion of ammonium cations drives the formation of intriguing capsular assemblies, both in solution [13][14][15][16] and in the solid state. In other calix-A C H T U N G T R E N N U N G arene-based systems, the inclusion of ammonium cations drives the formation of intriguing capsular assemblies, both in solution [13][14][15][16] and in the solid state.…”

“…13 C CP/MAS NMR spectra of 3 obtained at room temperature. a) As synthesized; b) after heating to 110 8C; c) after heating to 150 8C; d) after heating to 270 8C.…”

Facilitated Transfer of Alkali and Alkaline‐Earth Metal Ions by a Calix[4]arene Derivative Across Water/1,2‐Dichloroethane Microinterface: Amperometric Detection of Ca2+

“…In order to control the conformations of the calixarenes, to increase their solubility and to enhance the selectivity and efficiency of their complexation behaviors, they can be functionalized from the lower rim or upper rim for specific applications of host-guest chemistry for chemical sensors [21]. For this reason, the studies using calixarene derivatives as selective agent have increased dramatically in the recent years for the different applications [22][23][24][25].…”

Colorimetric responses of transparent polymers doped with metal phthalocyanine for detecting vaporous amines

“…In the past, several amine molecular receptors such as trifluoroacetyl derivatives [7][8][9], triphenylpyrilium derivative [10], and calix [4]arene [11,12] have been reported. Although these molecular receptors bind or react with amines selectively, they often require multiple steps to synthesize and they normally only work for one particular target.…”