Temperature dependence of an ammonia sensor in humid air based on a cryptophane-coated quartz microbalance

Schramm, Ursula; Roesky, C.E.O; Winter, Silke; Rechenbach, T.; Boeker, Peter; Lammers, Peter Schulze; Weber, Edwin; Bargon, Joachim

doi:10.1016/s0925-4005(99)00084-2

Cited by 18 publications

(8 citation statements)

References 7 publications

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“…158 Another example is a cryptophane-coated sensor using a quartz microbalance (QMB) sensitive to ammonia. 159 Other devices using cryptophanes are likely to develop in the field of environmental chemistry.…”

Section: Conclusionthe Future Of Cryptophanesmentioning

confidence: 99%

Cryptophanes and Their Complexes—Present and Future

2008

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Contents 98 4.2. Monofunctionalized Cryptophanes: Cryptophanol 98 4.3. Cryptophanes as Biosensors 99 4.4. Bis-cryptophanes 100 5. Structural Aspects and Characterization of Cryptophanes 100 5.1. Some Peculiarities in the Characterization of Cryptophane Hosts 101 5.2. Inverted and Imploded Cryptophanes 102 5.3. Molecular Structures of Cryptophane-A 1 and Related Ones 103 5.4. Some Aspects of Cryptophanes in the Crystalline State 104

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Section: Conclusionthe Future Of Cryptophanesmentioning

confidence: 99%

Cryptophanes and Their Complexes—Present and Future

2008

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“…In view of a potential use of the present lipophilic calixarenes for vapour sensing of terpenes, the vapour adsorption properties of the solid calixarenes were studied by means of a quartz microbalance device. 26,36 The results obtained with different terpenes (Fig. 9(a)) were compared with a similar QMB experiment using the common organic solvents, cyclohexane, cyclohexene, acetone, 37 dioxane and n-butanol, which feature functionalities and sizes comparable to the particular terpenes (Fig.…”

Section: Organic Vapour Sorptionmentioning

confidence: 99%

Upper rim site lipophilic calix[4]arenes as receptors for natural terpenes and functionally related solvent molecules: combined crystal structure and QMB sensor study

et al. 2011

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Three upper rim site lipophilic calix[4]arenes 1-3 featuring different para-alkanoyl substituents at the phenolic moieties, i.e. n-hexanoyl, n-octanoyl and 3-cyclohexylpropanoyl groups, are reported to complex, aside from the common solvent molecule n-butanol, different keto and hydroxylic terpene guest molecules such as (-)-menthone, (-)-menthol or (+)-carvone in the solid state. Although for all six inclusion compounds described here, a strict 1 : 1 host : guest stoichiometry is observed, complementary size and polarity relationships between the cone shaped calixarene cavity and the guest molecule emerge from single crystal X-ray structural study. Dependent on the structure of the guest molecule, the calixarenes are arranged in a head-to-head or head-to-tail orientation in the crystalline packing, giving rise to capsular or otherwise deeply enclosed inclusion mode of the guest molecules, respectively. Furthermore, the O-acyl atoms of the calixarenes were found to be directly involved in host-guest interaction. In order to estimate the degree of isostructurality of the host frameworks and to examine the influence of the guest molecules on the solid-state conformation of these calixarene molecules, isostructurality comparison, cell similarity and molecular isometricity calculations were carried out revealing a rare case of supramolecular morphotropism for the pair of ( )-menthone and (-)-menthol inclusions of the n-hexanoyl substituted calixarene. Structure-inclusion property relationship was examined by QMB measurements of thin layers of the calixarenes. Vapor studies with different terpenes and common organic solvents show an increased affinity towards guest molecules with polar functionalities, whereas small solvent molecules like acetone are bound considerably better than the more bulky terpene molecules

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“…When the active detection sites were anchored to the periphery of these metallodendrimers, full recovery, necessary for repetitive uses, of the sensor materials was possible. A recent report described a signal detection technique using a quartz crystal microbalance (QMB), 257,258 wherein substrate binding was detected by changes of the net mass of the surface (host-guest complex vs. host only).…”

Section: Sensorsmentioning

confidence: 99%