This invention relates to a dicyclopentadiene (DCPD)-based resin functionalized with groups capable of reacting with silica or carbon black for use in high performance tires and a preferred method of preparing the functionalized resin comprising ruthenium-catalyzed ring-opening cross metathesis. The functionalized resin may comprise the reaction product obtained by contacting a polymer comprising units derived from (DCPD) and a vinyl monomer or vinylene monomer in the presence of a metathesis catalyst, wherein the vinyl monomer or vinylene monomer comprises at least one of the following functional groups: a silyl group, a siloxy group, or an alkoxysilyl group. This invention further relates to a tire tread composition comprising the functionalized resin and which exhibits enhanced durability, traction, handling, and extractability properties.

Embodiments in accordance with the present invention encompass an organoruthenium compound of the formula I: (I) wherein X, Y, L.sub.1, L.sub.2, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are as defined herein. Also disclosed herein are the use of organoruthenium compound of the formula I as (pre)catalysts for the olefin metathesis reactions, as well as to the process for carrying out the olefin metathesis reaction. ##STR00001##

Embodiments in accordance with the present invention encompass an organoruthenium compound of the formula I: (I) wherein X, Y, L.sub.1, L.sub.2, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are as defined herein. Also disclosed herein are the use of organoruthenium compound of the formula I as (pre)catalysts for the olefin metathesis reactions, as well as to the process for carrying out the olefin metathesis reaction. ##STR00001##

A method for separating a homogeneous catalyst from a solution includes forming a host-guest compound between a first isomer of the catalyst and inclusion compound in the solution and isolating the host-guest compound from the solution. The catalyst may be released from the inclusion compound by converting the first isomer of the catalyst to a second isomer of the catalyst.

A method for separating a homogeneous catalyst from a solution includes forming a host-guest compound between a first isomer of the catalyst and inclusion compound in the solution and isolating the host-guest compound from the solution. The catalyst may be released from the inclusion compound by converting the first isomer of the catalyst to a second isomer of the catalyst.

Methods and systems for reaction product imaging. In various examples, a method is used to image fluorogenic reaction product(s), such as, for example, fluorogenic polymerization product(s) or the like. In various examples, a method of imaging a fluorescent polymerization product comprises a photo-uncaging reaction, a fluorogenic polymerization, and obtaining one or more fluorescence image(s) of one or more of the fluorescent polymerization product(s). In various examples, a system for imaging a fluorescent polymerization product comprises a first laser suitable to initiate a photo-uncaging reaction; and a second laser suitable to obtain one or more fluorescent image(s) of fluorogenic reaction product(s) and the product(s) is/are disposed on a substrate. In various examples, a method and/or a system is used to determine a polymer sequence, reaction kinetics, reaction dynamics, catalysis cooperativity between spatially distinct sites, molecular adsorption onto a surface, or the like.

Methods and systems for reaction product imaging. In various examples, a method is used to image fluorogenic reaction product(s), such as, for example, fluorogenic polymerization product(s) or the like. In various examples, a method of imaging a fluorescent polymerization product comprises a photo-uncaging reaction, a fluorogenic polymerization, and obtaining one or more fluorescence image(s) of one or more of the fluorescent polymerization product(s). In various examples, a system for imaging a fluorescent polymerization product comprises a first laser suitable to initiate a photo-uncaging reaction; and a second laser suitable to obtain one or more fluorescent image(s) of fluorogenic reaction product(s) and the product(s) is/are disposed on a substrate. In various examples, a method and/or a system is used to determine a polymer sequence, reaction kinetics, reaction dynamics, catalysis cooperativity between spatially distinct sites, molecular adsorption onto a surface, or the like.

A chemical reaction is catalyzed in an organic solvent using a water soluble N-heterocyclic carbene homogeneous catalyst to form a reaction mixture. An aqueous phase in the reaction mixture. A solvent in which the catalyst is insoluble is added to the reaction mixture, causing the catalyst to migrate to the aqueous phase to form a catalyst-laden aqueous phase. The catalyst is extracted from the catalyst-laden aqueous phase.

A chemical reaction is catalyzed in an organic solvent using a water soluble N-heterocyclic carbene homogeneous catalyst to form a reaction mixture. An aqueous phase in the reaction mixture. A solvent in which the catalyst is insoluble is added to the reaction mixture, causing the catalyst to migrate to the aqueous phase to form a catalyst-laden aqueous phase. The catalyst is extracted from the catalyst-laden aqueous phase.

A modified dicyclopentadiene-based resin and a preparation method thereof are provided. The preparation method of the modified dicyclopentadiene-based resin includes sequentially performing nitration reaction and hydrogenation reaction of a dicyclopentadiene phenolic resin to form a modified dicyclopentadiene-based resin for which the structure has at least two amino groups. The hydrogenation reaction is performed in a solvent at a temperature of 50? C. to 120? C.