װ ȭа ΰ

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

 
ۼ : 16-08-30 14:52
[2016.08]ö Unique Crystallization of Fullerenes: Fullerene Flowers
-
 ۾ :
ȸ : 529  

Unique Crystallization of Fullerenes: Fullerene Flowers

 

Jungah Kim, Chibeom Park, Intek Song, Minkyung Lee, Hyungki Kim and Hee Cheul Choi*


We made highly symmetrical flower-shaped fullerene crystals starting from mesitylene/ethanol solutions of mixed C60 and C70. The crystals consisted of both C60 and C70, with solvation by mesitylene. The main factor behind the unique crystal growth was the solubility difference between C60 and C70, which led to the two-stage growth: first C70 formed the center of the crystal, and then C60-C70 co-crystallized to form petals. The poor solvent, ethanol in our case, guided the crystallization mechanism to yield complex flower crystals, which is surprising because of the role of the poor solvent in affecting the crystallization pathway. By manipulating the morphology of the crystals on which the petal formation occurs, various fullerene flowers could be obtained: single-deck, double-deck, and multi-deck fullerene flowers. In addition, we synthesized more complex crystals by adopting a two-step growth process. The high surface energy of the tips of C60 hexagonal tubes resulted in a pair of fullerene flowers grown on each tip of a stem. The use of different types of solutions can effectively alter pre-grown fullerene flowers into larger fullerene flowers or edge-grown fullerene flowers. We believe that our findings provide insights into the solution-phase growth of molecular crystals and illuminate new aspects of crystallization chemistry.

 

      mesitylene, ethanol, C60, C70 ȥտκ mesitylene ڰ ԵǾִ Ǯ ϴ. ֿ ȥ ſ C60, C70 ص ̿ , ũ ܰ踦 Ͽ ˴ϴ. C70 ߽ɿ ϸ, ֺ C60, C70 ȥյǾ ̷ν ¸ ̷ ˴ϴ. (poor solvent) Ǯ ϴµ ߿ ϸ, ȭ ִ ϰ ˴ϴ. ̷κ ȭ ν Ǯ ־, ǥǾ C60 Ʃ ū ǥ ٴ ̿Ͽ Ʃ ߰ ų ־ϴ. 2016 8, Scientific Report Ǿϴ.


 
 

Total 72
ȣ     ۾ ¥ ȸ
72 [2017.07]ȯ Diastereo- and Enantioselective Synthesis of -Aminoboronate Esters by Copper(I)-Catalyzed 1,2-Addition of 1,1-Bis[(pinacolato)boryl]alkanes to Imines 07-20 30
71 [2017.06]ڹ Tattooing Dye as a Green Electrode Material for Lithium Batteries 07-03 100
70 [2017.04]輺 Cancer-Microenvironment-Sensitive Activatable Quantum Dot Probe in the Second Near-Infrared Window 04-20 394
69 [2017.01]ȯ Chemoselective Coupling of 1,1-Bis[(pinacolato)boryl]alkanes for the Transition-Metal-Free Borylation of Aryl and Vinyl Halides: A Combined Experimental and Theoretical Invesitigation 01-02 886
68 [2016.11]ڹ 1 Volt-Driven Superfast Polymer Actuators Based on Single Ion Conductors 11-16 857
67 [2016.09]α Ultrathin and Flat Layer Black Phosphorus Fabricated by Reactive Oxygen and Water Rinse 09-22 925
66 [2016.08]ö Unique Crystallization of Fullerenes: Fullerene Flowers 08-30 530
65 [2016.08]ö Nanocomb Architecture Design Using Germanium Selenide as High Performance Lithium Storage Material 08-29 781
64 [2016.08]ؿ Visualization and Quantification of MicroRNA in a Single Cell Using Atomic Force Microscopy 08-17 733
63 [2016.06]ȯ Transition-Metal-Free Regioselective Alkylation of Pyridine N-Oxides Using 1,1-Diborylalkanes as Alkylating Reagents 06-29 959
62 [2016.05]ؿ Quantification of Fewer Than Ten Copies of a DNA Biomarker without Amplification or Labeling 05-16 934
61 [1603] -Light-Induced Acid Generation on a Gatekeeper for Smart Nitric Oxide Delivery 03-30 1113
60 [16.01]ȯ -Synthesis of Branched Alkylboronates by Copper-Catalyzed Allylic Substitution Reactions of Allylic Chlorides with 1,1-Diborylalkanes 01-28 1408
59 [16.01] - Synergistic Nanomedicine by Combined Gene and Photothermal therapy 01-27 1054
58 [15.11] - A chemical inhibitor of the Skp2/p300 interaction that promotes p53-mediated apoptosis 11-26 1352
 1  2  3  4  5  

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player