ASAP Articles

Nanoparticles brought to order

(author unknown) — Mon, 19 Oct 2009 09:02:25 -0700

Using small molecules to evenly space nanoparticles in a polymer composite could bring nanoparticle properties to a larger scale

Small-molecule-directed nanoparticle assembly towards stimuli-responsive nanocomposites

Ting Xu — Sun, 18 Oct 2009 00:00:00 -0700

Small-molecule-directed nanoparticle assembly towards stimuli-responsive nanocomposites

Nature Materials. doi:10.1038/nmat2565

Authors: Yue Zhao, Kari Thorkelsson, Alexander J. Mastroianni, Thomas Schilling, Joseph M. Luther, Benjamin J. Rancatore, Kazuyuki Matsunaga, Hiroshi Jinnai, Yue Wu, Daniel Poulsen, Jean M. J. Fréchet, A. Paul Alivisatos & Ting Xu

All-Polymer Photovoltaic Devices of Poly(3-(4-n-octyl)-phenylthiophene) from Grignard Metathesis (GRIM) Polymerization

Thomas W. Holcombe et al — Tue, 06 Oct 2009 21:35:36 -0700

Journal of the American Chemical Society, Volume 131, Issue 40, Page 14160-14161, October 14, 2009.

Synthesis and In Vivo Antitumor Efficacy of PEGylated Poly(l-lysine) Dendrimer−Camptothecin Conjugates

Megan E. Fox et al — Sun, 04 Oct 2009 21:10:05 -0700

Molecular Pharmaceutics, Volume 6, Issue 5, Page 1562-1572, October 5, 2009.

Chemicals On Demand with Phototriggerable Microcapsules

Stefan J. Pastine et al — Tue, 22 Sep 2009 22:17:42 -0700

Journal of the American Chemical Society, Volume 131, Issue 38, Page 13586-13587, September 30, 2009.

Laser-Triggered Chemical Reactions

(author unknown) — Sun, 20 Sep 2009 21:00:00 -0700

Microcapsules in a mixture burst and release reactants on demand.

Site Isolation in Phosphorescent Bichromophoric Block Copolymers Designed for White Electroluminescence

Thu, 03 Sep 2009 00:00:00 -0700

Organization of phosphorescent domains in seld-assembled block copolymers is demonstrated to yield dual emission for white electroluminescence. Our block- copolymer approach minimizes energy transfer between two colored species by site isolation through morphology control, allowing higher loading concentration of red emitters with improved device performance.

[Communication]
Daniel A. Poulsen, Bumjoon J. Kim, Biwu Ma, C. Sebastian Zonte, Jean M. J. Fréchet
Adv. Mater., September 3, 2009, DOI: 10.1002/adma.200901453. Read article.

Downscaling Limits and Confinement Effects in the Miniaturization of Porous Polymer Monoliths in Narrow Bore Capillaries

Ivo Nischang et al — Sun, 30 Aug 2009 21:03:00 -0700

Analytical Chemistry, Volume 81, Issue 17, Page 7390-7396, September 1, 2009.

Soluble Polymer Carriers for the Treatment of Cancer: The Importance of Molecular Architecture

Megan E. Fox et al — Mon, 17 Aug 2009 22:08:13 -0700

Accounts of Chemical Research, Volume 42, Issue 8, Page 1141-1151, August 18, 2009.

Polarity-Directed One-Pot Asymmetric Cascade Reactions Mediated by Two Catalysts in an Aqueous Buffer

Steven T. Scroggins, Yonggui Chi, Jean M. J. Fréchet — Mon, 17 Aug 2009 00:00:00 -0700

A crossing between phases: Polarity makes a difference in distinguishing substrates of otherwise nearly identical chemical reactivities. A one-pot cascade reaction involving nitromethane and two aliphatic aldehydes with similar reactivities has been developed (see scheme). The use of a biphasic reaction medium with two different organic catalysts results in the controlled incorporation of both aldehyde substrates into a single major cross-product.

[Communication]
Steven T. Scroggins, Yonggui Chi, Jean M. J. Fréchet
Angew. Chem. Int. Ed., August 17, 2009, DOI: 10.1002/anie.200902945. Read article.

In Vivo Studies on the Effect of Co-Encapsulation of CpG DNA and Antigen in Acid-Degradable Microparticle Vaccines

Tristan T. Beaudette et al — Sun, 02 Aug 2009 21:11:51 -0700

Molecular Pharmaceutics, Volume 6, Issue 4, Page 1160-1169, August 3, 2009.

Chemoselective Ligation in the Functionalization of Polysaccharide-Based Particles

Tristan T. Beaudette et al — Tue, 28 Jul 2009 23:51:17 -0700

Journal of the American Chemical Society, Volume 131, Issue 30, Page 10360-10361, August 2009.

VIP: Polarity-Directed One-Pot Asymmetric Cascade Reactions Mediated by Two Catalysts in an Aqueous Buffer

Wed, 24 Jun 2009 00:00:00 -0700

Steven T. Scroggins, Yonggui Chi, and Jean M. J. Fréchet*

The concept of using polarity differences to direct reactions is demonstrated in a novel one-pot cascade sequence of condensation followed by conjugate addition. The two-step reaction incorporates nitromethane and two aliphatic aldehydes with similar chemical reactivities. Under typical homogeneous conditions either aldehyde can be incorporated at each step of the reaction, and a statistical mixture is formed of four equally favored products. In contrast, the use of a biphasic reaction medium with two different organic catalysts results in the selective incorporation of both aldehydes with a strong preference for a major "cross" product.

Received June 02, 2009, published online August 17, 2009, DOI: 10.1002/anie.200902945.

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Effect of Addition of a Diblock Copolymer on Blend Morphology and Performance of Poly(3-hexylthiophene):Perylene Diimide Solar Cells

Sridhar Rajaram et al — Mon, 04 May 2009 22:32:17 -0700

Chemistry of Materials, Volume 21, Issue 9, Page 1775-1777, May 12, 2009.

Solution-Processable α,ω-Distyryl Oligothiophene Semiconductors with Enhanced Environmental Stability

Clayton E. Mauldin et al — Mon, 04 May 2009 22:09:34 -0700

Chemistry of Materials, Volume 21, Issue 9, Page 1927-1938, May 12, 2009.

Solution Processing of a Small Molecule, Subnaphthalocyanine, for Efficient Organic Photovoltaic Cells

Biwu Ma et al — Mon, 20 Apr 2009 22:10:57 -0700

Chemistry of Materials, Volume 21, Issue 8, Page 1413-1417, April 28, 2009.

Surface Tension Mediated Conversion of Light to Work

David Okawa et al — Wed, 15 Apr 2009 13:00:27 -0700

Journal of the American Chemical Society, Volume 131, Issue 15, Page 5396-5398, April 22, 2009.

A Direct Route to Cyclic Organic Nanostructures via Ring-Expansion Metathesis Polymerization of a Dendronized Macromonomer

Andrew J. Boydston et al — Wed, 15 Apr 2009 10:17:03 -0700

Journal of the American Chemical Society, Volume 131, Issue 15, Page 5388-5389, April 22, 2009.

Tiny Machines Convert Sunlight Directly into Work

(author unknown) — Wed, 01 Apr 2009 13:00:00 -0700

Small watercraft made of nanostructured materials are propelled by sunlight.

Use of photopatterned porous polymer monoliths as passive micromixers to enhance mixing efficiency for on-chip labeling reactions

Jean M. J. Frechet — Wed, 07 Jan 2009 00:00:00 -0800

Dieudonne A. Mair, Thomas R. Schwei, Theresa S. Dinio, Frantisek Svec, Jean M. J. Frechet
(Paper from Lab Chip)
Dieudonne A. Mair, Lab Chip, 2009, DOI: 10.1039/b816521a
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One-Pot Multi-Component Asymmetric Cascade Reactions Catalyzed by Soluble Star Polymers with Highly Branched Non-Interpenetrating Catalytic Cores

(author unknown) — Wed, 23 Apr 2008 21:00:00 -0700

Yonggui Chi, Steven T. Scroggins, and Jean M. J. Fréchet
Web Release Date: Thu, 24 Apr 2008 00:00:00 EDT (Communication) DOI: 10.1021/ja8013456