Scaffold‐Optimized Dendrimers for the Detection of the Triacetone Triperoxide Explosive Using Quartz Crystal Microbalances

Lubczyk, Daniel; Grill, Matthias; Baumgarten, Martin; Waldvogel, Siegfried R.; Müllen, Kläus

doi:10.1002/cplu.201100080

Cited by 31 publications

(21 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, I would be remiss not to mention some of the future challenges in the field: i) it has been shown that the inner voids of these dendrimers can be tuned to act as perfect receptors for explosives, and, in conjunction with an ultramicrobalance, they can be used as sensors with picomolar detection limits. 28 It is important to utilize such host-guest interactions for other gas-sensing purposes; ii) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 borate functional groups can be encapsulated within the dendrimer core (11) to achieve weakly coordinating anions (WCAs). 29 These macromolecular ions hold great promise for controlling chemical reactions, for example, in stabilizing cationic zirconocenium catalysts during polyolefin synthesis.…”

Section: Dendritic Multichromophoresmentioning

confidence: 99%

Evolution of Graphene Molecules: Structural and Functional Complexity as Driving Forces behind Nanoscience

2014

Self Cite

View full text Add to dashboard Cite

Abstract:The evolution of nanoscience is based on the ability of the fields of chemistry and physics to share competencies through mutually beneficial collaborations. With this in mind, in this Perspective, I describe three classes of compounds: rylene dyes, polyphenylene dendrimers, as well as nanographene molecules and graphene nanoribbons, which have provided a superb platform to nurture these relationships. The synthesis of these complex structures is demanding, but also rewarding because they stimulate unique investigations at the singlemolecule level by scanning tunneling microscopy and single-molecule spectroscopy. There are close functional and structural relationships between the molecules chosen. In particular, rylenes and nanographenes can be regarded as honeycombtype, discoid species composed of fused benzene rings. The benzene ring can thus be regarded as a universal modular building block. Polyphenylene dendrimers serve, first, as a scaffold for dyes en route to multichromophoric systems and, second, as chemical precursors for graphene synthesis. Through chemical design, it is possible to tune the properties of these systems at the single-molecule level and to achieve nanoscale control over their self-assembly to form multifunctional (nano)materials.

show abstract

Section: Dendritic Multichromophoresmentioning

confidence: 99%

Evolution of Graphene Molecules: Structural and Functional Complexity as Driving Forces behind Nanoscience

2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Indeed, the semirigid character of the PPD scaffolds leads to a perfect nanosite definition of functional groups [190] such as chromophores [196,197], catalysts [190,198,199], or electrolytes [200] at the core, in the scaffold, or on the rim of the dendrimers [201]. Although these aspects are beyond the scope of the present text, it should be mentioned that polyphenylene dendrimers, due to their unique structure and functionalization, have served, for example, as light harvesting complexes [133,202], receptors for gas sensing [203,204], and carrier systems for crossing the blood-brain barrier [205,206].…”

Section: Scheme 8 Synthesis Of the Giant Hexagonal Pah C222 28mentioning

confidence: 95%

Graphene as a Target for Polymer Synthesis

Müllen

2013

Advances in Polymer Science

Self Cite

View full text Add to dashboard Cite

Graphene has remarkable physical properties, but existing production methods have severe deficiencies that limit its potential use in robust technologies. Opening a reliable and efficient synthetic route to graphene and its functionalized derivatives offers a path to overcome this obstacle for its practical application. Graphene can be regarded as a two-dimensional polymer (2D), and it is here argued that it, along with its derivatives, represents a realistic yet challenging target for polymer synthesis.In order to demonstrate the possibility of such syntheses, an overview is presented on the evolution of phenylene-based macromolecules. It is shown how classical linear polyphenylenes can be expanded to increasingly more sophisticated structures involving two-and three-dimensional (3D) polyphenylene architectures. A crucial aspect of the meticulous synthetic design of these molecules has been the avoidance of defects within the structures, resulting in the precise control of their physical, especially optoelectronic, properties.Linear conjugated polymers with defined optical properties have been made by controlling the degree of torsion between the benzene rings. This has included the development of efficient routes to ladder-type polymers and of step-ladder materials. Planar graphene molecules, or nanographenes, in a range of sizes and shapes have been fabricated by the controlled cyclodehydrogenation of 3D polyphenylene dendrimers. By combining knowledge gained from the synthesis of conjugated polymers, polyphenylene dendrimers, and nanographenes, it has proven feasible to make, either by solution or surface-bound methods, graphene nanoribbons with well-defined structures. These functional materials possess properties similar to graphene while displaying improved processability.Finally, we review less-sophisticated paths towards graphene materials involving processing of graphene oxide, its reduction, and its hybridization with other components. These too have a role to play in acquiring functional graphenes where K. Müllen (*) Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany e-mail: muellen@mpip-mainz.mpg.de a lesser degree of control over the properties is required. This voyage of exploration towards the precise synthesis of conjugated phenylene-based polymers has thus had the dual objectives of fundamental research and practical materials science. En route we have had to meet the sometimes conflicting gauntlets thrown down by these two aims, which has at times involved trade-offs between the theoretically desirable and the reasonably accessible.

show abstract

“…For poly (m-benzamide)s with an N-TEG chain, a phase separation occurred at around 55 C, where the solubility of the polymers sharply altered. In contrast, the phase Scheme 17 Proposed polymerization mechanism of chain-growth condensation polymerization of 25 204 Y. Ohta and T. Yokozawa separation of poly(m-benzamide)s with a N-tetra(ethylene glycol) chain gradually occurred between 58 and 72 C, i.e., a higher temperature than that of poly(m-benzamide)s with the N-TEG chain. The temperature-dependent phase separation process of each polymer was actually reversible, but a hysteresis on temperature (ΔT > 1.5 C) was observed during heating and cooling cycles (AE0.5 C min À1 ) [34].…”

Section: Cgcp Through the Inductive Effectmentioning

confidence: 99%

mentioning

confidence: 97%

Hierarchical Macromolecular Structures: 60 Years after the Staudinger Nobel Prize II

2013

Advances in Polymer Science

View full text Add to dashboard Cite

Scaffold‐Optimized Dendrimers for the Detection of the Triacetone Triperoxide Explosive Using Quartz Crystal Microbalances

Cited by 31 publications

References 34 publications

Evolution of Graphene Molecules: Structural and Functional Complexity as Driving Forces behind Nanoscience

Evolution of Graphene Molecules: Structural and Functional Complexity as Driving Forces behind Nanoscience

Graphene as a Target for Polymer Synthesis

Hierarchical Macromolecular Structures: 60 Years after the Staudinger Nobel Prize II

Contact Info

Product

Resources

About