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The selected processes were then used on real structures to validate that critical dimensions did not significantly vary.
HF, even at the lowest temperature (20°C), and it was never possible to match the CD of the structures (not shown here).
Besson, “Post-Etch Cleaning Chemistries Evaluation for Low k – Copper Integration” Solid State Phenom. 92 (2003) p.263-266 [2] L.
Siddiqui, “Impact of HF-based cleaning solutions on via resistance for sub-10nm BEOL structures”, Microelectron.
Ayral, “Porosity and structure evolution of a SiOCH low k material during post-etch cleaning process”.

Comparative Study of Raw and Water Rinsed Loa Janan’s Bituminous Coal Structure Siti Mutrofin1,a*, Rurini Retnowati2,b, Rachmat Triandi Tjahjanto1,c, Johan Kendek1,d and Muhammad Noor Aswad1,e 1Inorganic Laboratory, Chemistry Department, Faculty of Sciences, Brawijaya University, Malang, Indonesia, 65145 2Organic Laboratory, Chemistry Department, Faculty of Sciences, Brawijaya University, Malang, Indonesia, 65145 amutrofin@ub.ac.id, brretnowati@ub.ac.id, crachmat_t@ub.ac.id, djohankendek@gmail.com, emuhammadaswad@student.ub.ac.id Keywords: East Kalimantan, bituminous coal, structure Abstract.
This research aims to investigate whether water rinsed treatment affects the structure of the coal or not.
It has been reported elsewhere, the minerals contribute as supported material to pilar the layer carbon structure.
Basic theory of coal structure stated the present of three types of carbon sheet could be found depends on the class of coal.
A Van der Walls interaction connects between the sp2 carbon to sp2 carbon in the coal structure arrangement.

Synthesis, Fluorescence Properties of 2-Acetyl-2'-chloroacetanilide with Rare Earth Nitrates Complexes Xi-Shi Tai 1, a，Lin-Tong Wang 1 1 College of Chemistry and Chemical Engineering, Weifang University, Weifang 261061, P.R.
Introduction More and more interesting are focus on the studies of metal complexes over the past years [1], because metal complexes play a key role in understanding the coordination chemistry of metal ions [2].
The structure was solved by direct methods and refined by full-matrix least-squares techniques on F2.
The bonds distances and angles in this structure are agreement with that reported.
The crystal structure of (L) is stabilized by intramolecular hydrogen bonds.

The contribution of each descriptor to structure-retention time relationships was evaluated.
Today, it is well know, the green chemistry gives the benefit for environment and has been strongly advocated.
These descriptors are calculated from the molecular structures by the software CODESSA.
The molecular structures are optimized using the Polak-Ribiere algorithm until the root mean square gradient is 0.01.
[15] MOPAC 6.0, Quantum Chemistry Program Exchange, QCPE, No. 455, Indiana University, Bloomington, (1989)

Yuan, Journal of Materials Chemistry, Vol. 22 (2012), p.15540 [20] Z.
Mokaya, Journal of Physical Chemistry B, Vol. 110 (2006), p.18424 [21] L.
Yang, Journal of Physical Chemistry C, Vol. 116 (2012), p.1099 [22] G.
Titirici, Physical Chemistry Chemical Physics, Vol. 15 (2013), p.6080 [24] Y.
Zhao, Chemistry of Materials, Vol. 20 (2008), p.932 [25] H.

One of the most significant chemistry possibilities is the polymerization and polycondensation of compounds, which, in turn, are methods for producing polymers.
The idea of the filling material as an element of a single tooth-filling structure as an integral structure established the significance of the adhesive properties of the filling material.
Studies of polymers were carried out in the scientific branches of heat engineering and physics when modifying adhesive structures in the space field, in which it was proved that the strength and adhesion properties of adhesive structures were increased when exposed to an electromagnetic field due to the compaction of particles of the microstructure of a polymer adhesive.
Basin. - Moscow: Chemistry, 1974 . — 392 p
[2] Vilkov, LV Physical research methods in chemistry (Structural methods and optical spectroscopy) / LV Vilkov, Yu.

Physical Chemistry Research. 7, 4 (2019) 799-812
Moroccan Journal of Chemistry. 8, 2 (2020) 497-509
Arabian Journal of Chemistry. 14, 6 (2021) 103180
Materials Today Chemistry. 20 (2021) 100438
Inorganic chemistry. 51, 16 (2012) 9039-9044

It shows that MCM-48 with Ia3d point group structure has been synthesized [7].
Chinese Journal of inorganic chemistry, 2010, 26 (1): 13-16
Chemistry of Materials, 15 (22): 4160-4162
Chinese Journal of inorganic chemistry, 2005, 21 (8): 1165-1169
Journal of solid state chemistry, 2014, 218:71-80.

,Wheat: chemistry and technology.
Melbourne: Cereal Chemistry Division, Royal Australian Chemical Institute,(1985)
,Glutenin structure in relation to wheat quality.
Khan, Wheat grain proteins, in Wheat: chemistry and technology, K.
Wall: Cereal Chemistry Vol.52(1975), p.513-532 [15] B.S.

Synthesis of Spherical La2Mo2O9 Nanoparticles Using Sol-gel Process Quanzheng Zhang*1,2,a, Yuting Wang1, Xuan Cheng1, Xiao Liu1, Yanqin Zhang1, Jinjun Zhou1, Jun Cheng1 1Department of Chemistry & Material Engineering, Hefei University, Hefei, 230601, PR China 2State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China aemail: zqz@hfuu.edu.cn Keywords: La2Mo2O9, Sol-gel, nanoparticle.
As one of functional materials, molybdates with scheelite-type structure have attracted much attention for their potential applications[1-3].
The above results demonstrate that a well-crystallized structure of the La-Mo-O composite has been formed after calcination at 600 oC for 4h, which is in accordance with that of XRD pattern below.
The result is in accordance with crystal parameter of the cubic structure of La2Mo2O9[12]。
Acknowledgment Financial support for this work was provided by State Key Laboratory of Structural Chemistry of China (20110012) and National Undergraduate Training Programs for Innovation and Entrepreneurship in Hefei University (201311059027).