The phrase "a single purpose to" is correct and usable in written English.
It can be used when describing a specific goal or intention that is focused and singular in nature.
Example: "The organization was founded with a single purpose to improve literacy rates in underserved communities."
Alternatives: "a sole aim to" or "a singular goal to".
Masafumi Asada bought shares of the Tokyo Electric Power Company almost a decade ago with a single purpose: To vote against the use of nuclear power.
Religiously-charged phrases serve a single purpose: to provide comfort, reassurance.
Roth was extraordinary as a man scoured out by grief and left with only a single purpose to pursue.
It was built for a single purpose: to allow American troops to introduce an Afghan security presence in the valley.
But he's effective here as a man driven by a single purpose — to see Dillinger dead, one way or another.
But now a lot of shows at this end of the spectrum are built for a single purpose: to spend a maximum amount of a network's money.
The spokesman added that, while Dwan is aware "some will seek to find some ulterior motive for his actions", he is "involved in the provision of school improvement services for a sole single purpose, to promote better outcomes for our children".
The concept of "drug" therapy is the use of one chemical agent that is intended for a generally single purpose to optimize physiologic conditions resulting in the mitigation of cellular damage in an effort to promote healing.
He has attacked deputy Attorney General Rod Rosenstein and special counsel Robert Mueller, and conscripted Republicans in the House, to serve a single purpose ― to undermine lawful efforts to investigate the role of his campaign in Russia's attack on our election, and persuade his fervent followers that reckoning his responsibility subverts their will.
The gift, the largest in the university's history for a single purpose, is to be spent over 10 years, mainly to hire researchers to combine traditional approaches with newer fields like genomics.
It is absolutely open season on public education in Florida, with the traditional system to be replaced with a corporate marketplace with a single purpose ― to make a bunch of money while pretending to sort of educate a select few students, kind of.
