Nanoporosity and Exceptional Negative Thermal Expansion in Single‐Network Cadmium Cyanide

Phillips, Anthony E.; Goodwin, Andrew L.; Halder, Gregory J.; Southon, Peter D.; Kepert, Cameron J.

doi:10.1002/anie.200704421

Cited by 173 publications

(121 citation statements)

References 25 publications

Supporting

Mentioning

117

Contrasting

Order By: Relevance

“…Powder X-ray diffraction (PXRD) showed that 1 can retain framework integrity even after being heated at 673 K for 2 h (Supplementary Fig. S4), which is much higher than those for other organic and organic-inorganic hybrid solids showing large thermal expansion properties [4][5][6][7][8][9][10][11][12][13][14][15]21,22 . Gas sorption measurements showed that 1 cannot adsorb N 2 or O 2 at 77 K up to P/P 0 E1 but adsorb considerable CO 2 at 195 K, with an apparent Langmuir surface area of 188 m 2 g À 1 .…”

Section: Resultsmentioning

confidence: 99%

“…For example, a few flexible PCPs showed much larger thermal expansion than common solids because the open coordination frameworks are relatively flexible [4][5][6][7][8][9][10][11][12][13][14][15] . Whereas small positive thermal expansion (PTE, 0oao20 Â 10 À 6 K À 1 , a and b V for axial and volumetric thermal expansion coefficients, respectively) is an intrinsic property of common solids 16 , negative (NTE, ao0 K À 1 ) [17][18][19][20] , very large (|a|4100 Â 10 À 6 K À 1 ), tunable and other special thermal expansion behaviours are extremely rare and have received considerable theoretical and practical interest [21][22][23][24] , which may be rationally realized by PCPs.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Direct visualization of a guest-triggered crystal deformation based on a flexible ultramicroporous framework

et al. 2013

View full text Add to dashboard Cite

Host-guest composites may exhibit abnormal and/or controllable physical properties that are unavailable for traditional solids. However, it is still very difficult to control or visualize the occupancy and motion of the guest. Here we report a flexible ultramicroporous coordination polymer showing exceptional guest-responsive thermal-expansion properties. The vacant crystal exhibits constant and huge thermal expansion over a wide temperature range not only in vacuum but also in air, as its ultramicroporous channel excludes air adsorption even at 77 K. More interestingly, as demonstrated by single-crystal X-ray crystallography, molecular dynamic simulations and solid-state nuclear magnetic resonance, it selectively responds to the molecular rearrangement of N,N-dimethylformamide, leading to conformation reversion of the flexible ligand, which transfers these actions to deform the whole crystal lattice. These results illustrate that combination of ultramicroporous channel and flexible pore surface could be an effective strategy for the utilization of external physical and chemical stimuli.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Direct visualization of a guest-triggered crystal deformation based on a flexible ultramicroporous framework

et al. 2013

View full text Add to dashboard Cite

show abstract

“…To this end, strong covalent bonds are not indispensable. This point is exemplified by a series of cyanide-bridged compounds [24][25][26][27]. This class of materials exhibits the largest NTE in this category, i.e.…”

Section: Cyanidesmentioning

confidence: 99%

Negative thermal expansion materials: technological key for control of thermal expansion

Takenaka

2012

Science and Technology of Advanced Materials

489

311

View full text Add to dashboard Cite

Most materials expand upon heating. However, although rare, some materials contract upon heating. Such negative thermal expansion (NTE) materials have enormous industrial merit because they can control the thermal expansion of materials. Recent progress in materials research enables us to obtain materials exhibiting negative coefficients of linear thermal expansion over −30 ppm K −1 . Such giant NTE is opening a new phase of control of thermal expansion in composites. Specifically examining practical aspects, this review briefly summarizes materials and mechanisms of NTE as well as composites containing NTE materials, based mainly on activities of the last decade.

show abstract

“…1,6-10 The NTE materials have generated significant scientific and commercial interest because they can be used to compensate the more usual positive thermal expansion ͑PTE͒ of usual materials. In recent years intense investigations of materials scientists have led to the discovery of several new materials [11][12][13] that show NTE behavior.…”

Section: Negative Thermal Expansion Of Reo 3 In the Extended Temperatmentioning

confidence: 99%

Negative thermal expansion of ReO3 in the extended temperature range

Chatterji

Hansen

Brunelli

et al. 2009

Applied Physics Letters

View full text Add to dashboard Cite

We reported previously [T. Chatterji et al., Phys. Rev. B 78, 134105 (2008)] negative thermal expansion (NTE) in ReO3 in the limited temperature range from 2 to 220 K. Here we discovered NTE in ReO3 at higher-temperature region from 600 to 680 K. We determined the temperature variation in the lattice parameter and the unit cell volume of ReO3 by neutron diffraction. The temperature variation in the lattice parameter and the unit cell volume show two regions of NTE and two minima. We attribute the NTE of ReO3 to be the result of anharmonicity and anomalous softening of M3 phonon mode.

show abstract

Nanoporosity and Exceptional Negative Thermal Expansion in Single‐Network Cadmium Cyanide

Cited by 173 publications

References 25 publications

Direct visualization of a guest-triggered crystal deformation based on a flexible ultramicroporous framework

Direct visualization of a guest-triggered crystal deformation based on a flexible ultramicroporous framework

Negative thermal expansion materials: technological key for control of thermal expansion

Negative thermal expansion of ReO3 in the extended temperature range

Contact Info

Product

Resources

About