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Synthesis and Luminescence Properties of Colloidal YVO4:Eu Phosphors


05 Feb 2017

Synthesis useful for a laboratory course.

Solid state phosphors in the form of nanosized particles attract a lot of attention. This interest is of both fundamental and practical character. Ultrafine and homogeneous fluorescence particles can be used as biological labels and in the various lightning...

(2)

Particle size dependence of oxygen evolution reaction on nanocrystalline RuO2 and Ru0.8Co0.2O2−x


05 Feb 2017

A nice approach to synthesis of doped RuO2 nanopowders

Ruthenium oxide is one of the most active electrocatalytic material for oxygen evolution reaction (OER) and chlorine evolution reaction (CER). The attempts of improve its performance or to decrease the cost of the industrial electrodes resulted in many...

(2)

A fast and oxygen-promoted protocol for the ligand-free Suzuki reaction of 2-halogenated pyridines in aqueous media


08 Jan 2017

Best method to make various 2-phenylpyridine derivatives

Review :-

1) Synthesized all compounds from Table 1 (1-8) and Table 2 (1-13). I was able to achieve higher yields than the ones reported in this paper by doubling the catalyst concentration.

2) I used excess i.e 3 mol % Palladium acetate than the...

(2)

8-Dioxane ferra(III) bis(dicarbollide): A paramagnetic functional molecule as versatile building block for introduction of a Fe(III) centre into organic molecules


14 Dec 2016

Very useful paper for niche applications using metallacarboranes

Covalent attachment of 1,4-dioxane to beta born of ferracarborane sandwich complexes which can be easily outfitted with many organic functional groups. Procedure worked as reported, with moderate yields of 60-70%. Higher yields were achieved at smaller scales...

(2)

Markovnikov Alkyne Hydrosilylation Catalyzed by Ruthenium Complexes


24 Dec 2016

trans-hydrosilylation internal alkynes: notes/modifications

Summary:

Trost and Ball discovered the efficient Ru-catalyst for Markovnikov hydrosilylation of terminal alkynes as well as trans-hydrosilylation of internal alkynes. This reaction is the only general method for accessing geminal alkenylsilanes via ...

(3)

High Current, Low Voltage Carbon Nanotube Enabled Vertical Organic Field Effect Transistors


16 Feb 2017

CN enabled VOFET potential to drive pixels in AMLED

In this manuscipt, a high current low voltage carbon nanotube (CN) enabled vertical organic field-effect transistor (VOFET) is reported that have the future potential to drive the pixels in active matrix organic light emitting diode (AMLED).

...

(3)

Stereocontrolled construction of the trans-tetrahydrofuran units in Annonaceous acetogenins


19 Dec 2016

Experimental not reproducible as written

Procedure for synthesis of intermediate 2 was repeated three times at identical scale and reaction conditions as described and then modified. When followed exact same procedure as-written (12 hours), desired compound was obtained in 14% yield (confirmed by...

(3)

Palladium-Catalyzed Silastannation of Secondary Propargylic Alcohols and their Derivatives


01 Nov 2016

Pd-catalyzed element-element addition to alkynes-a route to bis-functionalized alkenes

Tanner et al. has reported the silastannation reaction of several secondary terminal propargylic alcohols (protected and unprotected) with Pd2(dba)3·CHCl3/ Ph3P (1-2 equivalents of per Pd). Excellent regio and stereoselectivity (cis addition with tin always...

(2)

Design of Narrow-Bandgap Polymers. Syntheses and Properties of Monomers and Polymers Containing Aromatic-Donor and o -Quinoid-Acceptor Units


17 Feb 2017

Better yields with slight optimizations

This paper describes the synthesis and characterization of a series of thiophene- and N-methylpyrrole-based low band gap polymers incorporating o-quinoid acceptors such as thienopyrazine, quinoxaline, benzothiadiazole, pyrazinoquinoxaline,...

(2)

A Practical Synthesis of 3,3‐Difluorocyclobutane Carboxylic Acid


22 Feb 2017

Steven P. Cummings, Post-Doc

This communication was outstanding in providing a vast improvement to a very dangerous and potentially synthetically challenging method in obtaining 3,3-difluorocyclobutane carboxylic acid.  Ultimately the synthesis provided greater yields, easier workups,...

(3)

Sulfonated Schiff base dinuclear and polymeric copper( ii ) complexes: crystal structures, magnetic properties and catalytic application in Henry reaction


24 Dec 2016

More aldehydes need to be tested for reproducibility

Summary:

This paper describes the synthesis of dinuclear and polymeric copper complexes of a sulfonated Schiff base ligand, 2-(2-pyridylmethyleneamino)benzenesulfonic acid. Also described, are the crystal structures, magnetic properties and catalytic...

(1)

Asymmetric synthesis of (−)-α-conhydrine


09 Dec 2016

Exp. Modification Necessary to Address Variable Yield

In one of my recent projects, I need find a method to convert diethyl malonate-d2 into 3-bromopropanol-d6. Following a literature reported procedure (Eur. J. Org. Chem. 2011, 3339–3346), diethyl malonate-d2 underwent lithium aluminum deuteride (LAD) reduction...

(2)

Stereoselective Synthesis of 3-Hydroxyproline Benzyl Esters fromN-Protected β-Aminoaldehydes and Benzyl Diazoacetate


19 Dec 2016

Adaptations Necessary to Improve Published Syntheses

This review addresses the published preparation of compound 10c as listed in JOC 69, 4361 (2004).  The stated preparation utilizes the inexpensive, commercially available diol, 6c.  The preparation begins by combining the diol with one equivalent of TESCl in...

(2)

O-(diphenylphosphinyl)hydroxylamine: preparation and some characteristic chemical reactions


19 Dec 2016

Adequate Synthesis; Improved Preparation Has Been Reported

This reaction was repeated to prepare O-diphenylphosphinyl hydroxylamine as this compound was reported to be a "less explosive" electrophilic aminating agent.  Note:  a recent improved preparation has been reported.  (DSC measurements of the isolated compound...

(2)

Bithiophene-Imide-Based Polymeric Semiconductors for Field-Effect Transistors: Synthesis, Structure−Property Correlations, Charge Carrier Polarity, and Device Stability


17 Feb 2017

Reliable Experimental

Synthesized 4,4’-didodecyl-2,2’-bithiophene (2b), and a similar compound 4,4’-dihexyl-2,2’-bithiophene (dhexbTH) following the procedure for the synthesis of 2a and 2b (given in supporting info.).

The yield for the synthesis of pure 2b was 50 %, which is...

(2)

Rapid and Green Synthesis of some Benzothiazole-, Benzimidazole- and Benzoxazole-2-thiol Derivatives Using Copper Sulfate in Aqueous Media


09 Mar 2017

Reproducible method. Certain aspects can be improved.

Summary:

An easy, green, efficient and simple for synthesis of derivatives of benzimidazole-, benzothiazole- and benzoxazole-2-thiol has been described. Although previous methods are available in literature for synthesis of such compounds, this method...

(1)

On a new synthesis of sterpurene and the bioactivity of some related Chondrostereum purpureum sesquiterpene metabolites


09 Dec 2016

Reliable procedure but modifications helpful

The article by Strunz and co-workers reported a total synthesis of sterpurene and the bioactivity of some related sesquiterpene metabolites.

I am particularly interested in the preparation of intermediate 14 (4-step synthesis, Scheme 3) since it could...

(1)

Symmetry and polar-π effects on the dynamics of enshrouded aryl-alkyne molecular rotors


01 Nov 2016

reproducible process and yield

Synthesized similar structures to (13)- "4'-bromo-2',3,5,6'-tetramethoxy-[1,1'-biphenyl]-4-yl trifluoromethanesulfonate" and also other subtitude functional group on 2',3,5,6' position- using the same procedures as are written in the paper in Supporting...

(1)

Butane 2,3-Bisacetal Protection of Vicinal Diequatorial Diols


09 Dec 2016

Clear, Detailed Paper

After searching for an alternate protecting group for the protection of cis-dihydrocatechols, it was found that the butane-bisacetals were more resilient to hydrolysis. This is crucial when protecting group stabiity is required for acetals that are exposed to...

(2)

Efficient, one-pot syntheses of biologically active α-linked glycolipids


09 Dec 2016

Adjustments needed to increase efficiency of methodology

The methodology described in this article is very valuable for scientists working with glycosphingolipids. It provided a one-pot syntheses of alpha-linked glycolipids with the possibility of using substrates with unsaturations in the fatty acid side...

(1)