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The photochromic process of diarylethenes is based on a reversible transformation between the open-ring isomer with a hexatriene structure and the closed-ring isomer with a cyclohexadiene structure, according to the Woodward–Hoffmann rule [2,7].
Irie: The Journal of Organic Chemistry.
The Journal of Physical Chemistry C.
Journal of Photochemistry Photobiology A: Chemistry.
Cui: Beilstein Journal Organic Chemistry.

Ritala, Atomic layer deposition chemistry: Recent developments and future challenges.
Material Chemistry and Physics, 2000. 65(2): p. 4
Chemistry of Materials, 1993. 5(8): p. 1174-1181
Chemistry of Materials, 2008. 20(9): p. 3085-3091
Aarik, J., et al., Morphology and structure of TiO2 thin films grown by atomic layer deposition.

The results showed that the materials have regular hexagonal mesoporous structure.
The structure is more regular and pore size is more bigger after TMB added.
The result showes that inorganic skeleton of synthesized meterials has MCM-41 feature with hexagonal-phased structure.
The result showes that the synthesized material has regular hexagonal mesoporous structure.
Colloid and Surface Chemistry,edtied by Chemistry Industrial Press, China (1997).

Fig.2 The XRD pattern of composite materials of ZAO/TNTs with different content of Zn Results and Discussion Effects of the content of Zn on phase structure of ZAO/TiO2 nanotubes composite material.
Seen from the Fig.4, the crystalline phase of powder which was phase of ZnO represents hexagonal system of wurtzite structure without mingling Al.
The content of Zn has decisive influence on phase structure and morphology of composites of ZAO/TiO2 nanotubes.
Chemistry & Bioengineering. 2006.23(9):15 [2] Jong Hua Jung, Hideki Kohayashi, et a1.Creation of nard hel-ical ribbon and double-layered nanotube TiO2 structures using an organogel template[J].Chen Mater,2002,14:1445 [3] Graham A, Robert A, Canales J, et a1,TiO2(B) Nanotubes as negative electrodes for rechargeable lithium batteries[J],Chen Commun,2005,5(19):2454-2456 [4] Chen Y S, Crittenden J C, Hackney S, et a1.Preparation of a no-vel TiO2-based p-n junction nanotube photo-catalyst[j].
[6] Wang W Z,Varghese O K,Paulose M,et a1.A study on the growth and structure of titania nanotubes [J].J M R,2004,19(2):417-422.

The mechanism of intumescent flame retardant system (IFR) can be explained by the fact that, PER is phosphorylated by the APP with the release of water and ammonia, the phosphate ester is thermally decomposed during pyrolysis with the formation of double bonds, which subsequently crosslink with the formation of a three-dimensional network structure.
It can be seen from Fig. 2 that the char layer is greatly expanded into a honeycomb structure, and this charred layer can provide a much better barrier for the transfer of heat, combustible gases, and free radicals during fire, thus is also less susceptible to crack.
Journal of Agriculture Food Chemistry, Vol. 27,(1979), p. 612
Industrial Engineering & Chemistry Research.
Industrial Engineering & Chemistry Research.

Biopolymer thin films for photonics applications Roxana Popescu 1, Mirela Moldoveanu2 and Ileana Rău 1a 1 University POLITEHNICA of Bucharest, Faculty of Applied Chemistry and Materials Sciences Department of General Chemistry 1 Polizu Street, Bucharest, Romania 2 University POLITEHNICA of Bucharest, Faculty of Applied Chemistry and Materials Sciences Department of Physical Chemistry and Electrochemistry 1 Polizu Street, Bucharest, Romania a email: ileana.rau@upb.ro Keywords: DNA, collagen, photo stability, thermal stability, degradation kinetics Abstract.
The chemical structure of this chromophore is shown in Fig. 1.
Chemical structures of Rhodamine 590 The guest-host systems at different concentrations of dye molecules were prepared in water solution.

However, its application range is largely limited by its defeat in structure and properties.
Structure Analysis and Technology Index The IR spectra of pure and modified starch both show a abroad absorption band characteristic of glucosidic ring of starch between 3450 cm-1and 3200 cm-1.As expected, there is an additional sharp absorption band at 1639.4cm-1 due to —C＝O stretching, and the band moves to lower wave value direction because of being affected by substitution group.
Li: Fine Chemicals Chemistry and Technology (Science Press, Beijing 1998) [2] H.
Julious: Macromolecular Chemistry and Physics, Vol.206 (2005), p. 1648 [6] A.
Wang: Application Technology of Computer in Chemistry and Chemical Engineering (Science Press, Beijing 2010)

The X-ray diffraction analysis of polymer-metal composites are executed on diffractometer DRON-2 to define their phase structure.
The scanning electron microscopy (SEM) images of composite surface MF+М0 (Fig.6) display their various structure.
Chemistry, Moscow, 2000
Chemistry, Moscow, 1989
Chemistry, Moscow, 1976

FAST DEPOSITION OF NANOCRYSTALLINE HYDROXYAPATITE INTO ADDITIVE MANUFACTURED TITANIUM POROUS STRUCTURES B.Bracci1, S.Panzavolta1, A.Bigi1, S.Prosperi2 and F.Bucciotti2 1Department of Chemistry “G.Ciamician”, University of Bologna, Italy 2Eurocoating SpA, Cirè-Pergine Valsugana (TN), Italy barbara.bracci@unibo.it, silvia.panzavolta@unibo.it, adriana.bigi@unibo susannaprosperi@eurocoating.it, francescobucciotti@eurocoating.it Keywords: hydroxyapatite, deposition, porous structures, coatings Abstract.
Interconnected and highly porous structures on uncemented titanium or titanium based alloy implants allow bone ingrowth and enhance the fixation stability of the implants.
Na+ Ca2+ Cl- HCO3- PO43- 25,5 mM 2,5 mM 5,0 mM 18 mM 2,5 mM Results and Discussion Immersion into the CaP solution for 6 h provoked the deposition of an uniform thin coating on the cups, independently from their structure.
EDS spectrum confirms the presence of the apatitic phase inside the porous structure (Figure 3c).
Bars = 100 μm Conclusions The results of this study indicate that the CaP solution tested yields a fast deposition of uniform HA coatings also inside thick Ti alloy porous structures as those obtained using AM techniques.

These functional groups have rich chemistry [49].
Synergetic effects in the structure and properties, Langmuir. 23 (2007) 3712-3722
Costa, and P.M.Deyà, Structure and binding energy of anion− π and cation− π complexes: a comparison of MP2, RI-MP2, DFT, and DF-DFT methods, The J. of physical chemistry A, 109(20) (2005) 4632-4637
J. of Physical Chemistry C, 112(25) (2008) 9315-9319
Haddon, Spectroscopic study of the Fermi level electronic structure of single-walled carbon nanotubes, Nano Lett. 2 (2002)155–159