News

April 2026 — Pyromellitic dihydrazides paper in Org. Biomol. Chem.

Journey, Ryan, Kara, Baela, Healeam, and Sam show that pyromellitic dihydrazides are a hydrolytically stable upgrade to classic pyromellitic diimides — now published in Organic & Biomolecular Chemistry.

June 2025 — New NSF RUI grant awarded

We’ve been awarded a new NSF grant to explore pyrazoloindazoles as long wavelength chromophores and emitters — excited to fund twelve students over the next three years.

October 2024 — Bisphosphonium diimides in Chem. Eur. J.

Can you cram phosphonium groups onto the smallest diimides? Turns out, yes. Feven, Min Ji, Daniela, Conor, and Steven show how in Chemistry – A European Journal, complete with some striking radical chemistry.

July 2024 — New diimide scaffolds in Beilstein J. Org. Chem.

Adam, Daniela, and Xavier expand the diimide family — their synthesis and characterization of 1,2,3,4-naphthalene and anthracene diimides is out in Beilstein Journal of Organic Chemistry.

May 2024 — Organic Syntheses summer grant

Organic Syntheses, Inc. is funding two students this summer to work on cycloadditions of 3-arylmaleimides with maleimides.

December 2023 — Individualized exams chapter published

How do you make unique organic chemistry exams for every student? Dennis wrote up our approach in a chapter for Engaging Chemistry Students with Real-World Context (ACS Symposium Series).

September 2023 — New ACS PRF grant for dihydrazide research

The ACS Petroleum Research Fund is supporting our work on the synthesis and characterization of novel aromatic dihydrazides.

July 2023 — Book chapter on radical self-assembly

Dennis contributed a chapter on self-assembly templated by radical-radical interactions to Supramolecular Nanotechnology (Wiley). A fun opportunity to step back and review the field.

May 2023 — Round two with azaacene bisimides

The Bunz Lab collaboration continues to be fruitful. This second generation of cata-annulated azaacene bisimides pushes electron affinities even further. Published in ChemPlusChem.

October 2022 — Halogenated diimides in J. Org. Chem.

A true team effort — Brian, Kellie, Stella, Feven, Healeam, Cathy, and Adam all contributed to this one. We finally cracked the synthesis of halogenated benzene-1,2,3,4-tetracarboxylic diimides. Out now in J. Org. Chem.

August 2022 — RealOrganicChemistry.org in J. Chem. Educ.

Our teaching project gets the writeup treatment — the paper describing RealOrganicChemistry.org and how we use literature reactions in the classroom is out in Journal of Chemical Education.

May 2022 — Beckman Scholars Program awarded

Macalester has been awarded a Beckman Scholars Program grant from the Arnold & Mabel Beckman Foundation — a tremendous opportunity for our undergraduate researchers.

April 2022 — Honors upon honors

We had a busy Spring, with three students successfully defending their honors theses… congrats to Adam, Brian, and Cathy!

January 2022 — Henry Dreyfus Teacher-Scholar Award

Dennis has been named a Henry Dreyfus Teacher-Scholar by the Dreyfus Foundation, recognizing accomplishments in both research and teaching.

July 2021 — More azaacene diimides

Our diimides made their way to Germany and the Bunz Lab and turned into a fun series of azaacenes with NIR absorptions and great electron affinities.

April 2021 — Conor defends Honors thesis

Conor fended off the pandemic with a presentation and successful defense of his Honors work. Conor will stick around Macalester for a little, take a gap year, then pursue a PhD at UC Berkeley. Congrats Conor!

February 2021 — Dennis receives tenure

It’s official! Dennis has received tenure at Macalester, which was only possible because of the contributions of everyone who spent time in the Cao Lab.

May 2020 — Alumni heading to PhD programs

Five alumni accepted PhD offers: Joe (Purdue), Kellie (Georgia Tech), Kofi (UT Austin), Stella I. (Johns Hopkins), and Stella L. (Caltech).

May 2020 — NSF RUI grant awarded

Lab awarded an NSF RUI grant for research on aromatic diimide stabilized acenes and radicals.

October 2019 — Phosphonium ylide paper published

Paper on an exceptionally stabilized phosphonium ylide published in Chemistry – A European Journal.

July 2019 — Heteroacene paper accepted

Article on angled aromatic diimide and heteroacenes accepted by Journal of Organic Chemistry.

April 2019 — Kellie selected for ACS fellowship

Kellie Stellmach selected for ACS Organic Chemistry Summer Undergraduate Research Fellowship.

February 2019 — Dennis receives Cottrell Scholar Award

Dennis received the 2019 Cottrell Scholar Award from the Research Corporation for Scientific Advancement.

July 2018 — Harvestman mating gifts paper published

Penny Kahn’s thesis on harvestman mating gifts published in Ecology and Evolution.

January 2018 — First independent paper published

First article published in ACS Omega on cationic pyromellitic diimides.

December 2017 — Eman defends Honors thesis

Eman successfully defended her honors thesis on cage synthesis.

July 2017 — Ferroelectric paper published in JACS

Ferroelectric paper published in JACS demonstrating two dimensions of polarization.

May 2017 — Welcome summer students

Four summer students welcomed through the HHMI Young Researchers program.

May 2017 — ACS PRF New Investigator Grant awarded

The ACS Petroleum Research Fund has funded our proposal on the synthesis and characterization of naphthalene and biphenylene tetraimides. Looking forward to putting six students to work on this.

April 2017 — Penny defends Honors thesis

Penny successfully defended her interdisciplinary Honors thesis on harvestmen secretions.

March 2017 — Kellie Stellmach joins the lab

Kellie Stellmach joined the lab as a first-year student.

December 2016 — Eman awarded Mindlin Foundation fellowship

Eman awarded the Mindlin Foundation 2017 Undergraduate Mentored Research fellowship.

October 2016 — ACS PRF funding approved

ACS Petroleum Research Fund approved our research proposal for funding.

October 2016 — Fraser Stoddart wins Nobel Prize

Fraser Stoddart, Dennis’s PhD advisor, won the Nobel Prize in Chemistry.

August 2016 — Green chemistry curriculum grant

We received funding from the Minnesota Pollution Control Agency to develop green chemistry lab experiments for introductory and advanced chemistry courses at Macalester.

May 2016 — Welcome summer students

Six summer students began research through various funding sources.

April 2016 — Dan defends Honors thesis

Dan successfully defended his Honors thesis.

March 2016 — Dan receives NSF GRFP Honorable Mention

Dan received an NSF GRFP Honorable Mention.

February 2016 — Mohammed Modan joins the lab

Mohammed Modan joined the lab as a sophomore chemistry major.

November 2015 — Penny Kahn joins the group

Penny Kahn joined the group as a junior studying biology with a chemistry minor.

October 2015 — Combiflash operational

Combiflash Rf+ automated chromatography instrument operational in the lab.

September 2015 — Dan Lee joins the lab

Dan Lee joined as a senior in the Macalester Honors Program.

February 2015 — Birth of a lab website

Dennis begins his independent career at Macalester officially on August 1, 2015. In the meantime, he has excitedly spent some time creating this rudimentary website. Hopefully it will be filled with interesting news updates as the years go on.